support for file based and sd partition based emusd

2025-05-20 00:40:48 +02:00
parent 865b9dc1a4
commit 9b95d026f3
25 changed files with 1691 additions and 294 deletions
--- a/2
+++ b/2
@@ -37,7 +37,7 @@ OBJS += $(addprefix $(BUILDDIR)/$(TARGET)/, \
 	fuse.o kfuse.o \
 	sdmmc.o sdmmc_driver.o emmc.o sd.o emummc.o emummc_file_based.o emusd.o \
 	bq24193.o max17050.o max7762x.o max77620-rtc.o \
-	hw_init.o boot_storage.o \
+	hw_init.o boot_storage.o emusd.o file_based_storage.o \
 )

 # Utilities.
--- a/bdk/storage/file_based_storage.c
+++ b/bdk/storage/file_based_storage.c
@@ -0,0 +1,190 @@
+#include "file_based_storage.h"
+#include <libs/fatfs/ff.h>
+#include <stdlib.h>
+#include <string.h>
+#include "gfx_utils.h"
+
+typedef struct{
+	FIL active_file;
+	s32 active_file_idx;
+	char base_path[0x80];
+	u32 part_sz_sct;
+	u32 base_path_len;
+}file_based_storage_ctxt_t;
+
+static file_based_storage_ctxt_t ctx;
+
+int file_based_storage_init(const char *base_path) {
+	ctx.active_file_idx = -0xff;
+	ctx.base_path_len = strlen(base_path);
+
+	strcpy(ctx.base_path, base_path);
+	strcat(ctx.base_path, "00");
+
+	gfx_printf("file based init %d %s\n", ctx.base_path_len, ctx.base_path);
+
+	FILINFO fi;
+	if(f_stat(ctx.base_path, &fi) != FR_OK) {
+		return 0;
+	}
+
+	if(fi.fsize) {
+		ctx.part_sz_sct = fi.fsize >> 9;
+		gfx_printf("file based init sz 0x%x\n", ctx.part_sz_sct);
+	}else{
+		return 0;
+	}
+	ctx.part_sz_sct = fi.fsize;
+	return 1;
+}
+
+void file_based_storage_end() {
+	if(ctx.active_file_idx != -0xff) {
+		f_close(&ctx.active_file);
+	}
+	ctx.active_file_idx = -0xff;
+	ctx.part_sz_sct = 0;
+}
+
+static int file_based_storage_change_file(const char *name, s32 idx) {
+	int res;
+
+	if(ctx.active_file_idx == idx){
+		return FR_OK;
+	}
+
+	if(ctx.active_file_idx != -0xff){
+		f_close(&ctx.active_file);
+		ctx.active_file_idx = -0xff;
+	}
+
+	strcpy(ctx.base_path + ctx.base_path_len, name);
+
+	#if FF_FS_READONLY == 1
+	res = f_open(&ctx.active_file, ctx.base_path, FA_READ);
+	#else
+	res = f_open(&ctx.active_file, ctx.base_path, FA_READ | FA_WRITE);
+	#endif
+
+	if(res != FR_OK){
+		gfx_printf("file based open fail %s\n", ctx.base_path);
+		return res;
+	}
+
+	ctx.active_file_idx = idx;
+
+	return FR_OK;
+}
+
+static int file_based_storage_readwrite_single(u32 sector, u32 num_sectors, void *buf, bool is_write){
+	#if FF_FS_READONLY == 1
+	if(is_write){
+		return FR_WRITE_PROTECTED;
+	}
+	#endif
+
+	int res = f_lseek(&ctx.active_file, (u64)sector << 9);
+	if(res != FR_OK){
+		return res;
+	}
+
+	if(is_write){
+		res = f_write(&ctx.active_file, buf, (u64)num_sectors << 9, NULL);
+	}else{
+		res = f_read(&ctx.active_file, buf, (u64)num_sectors << 9, NULL);
+	}
+
+	if(res != FR_OK){
+		gfx_printf("file based rw fail %s 0x%x 0x%x \n", ctx.base_path, num_sectors, sector);
+		return res;
+	}
+
+	return FR_OK;
+}
+
+int file_based_storage_readwrite(u32 sector, u32 num_sectors, void *buf, bool is_write) {
+	#if FF_FS_READONLY == 1
+	if(is_write){
+		return 0;
+	}
+	#endif
+
+	if(ctx.part_sz_sct == 0){
+		return 0;
+	}
+
+	int res;
+
+	u32 scts_left = num_sectors;
+	u32 cur_sct = sector;
+
+	while(scts_left){
+		u32 offset = cur_sct % ctx.part_sz_sct;
+		u32 sct_cnt = ctx.part_sz_sct - offset;
+		sct_cnt = MIN(scts_left, sct_cnt);
+
+		u32 file_idx = cur_sct / ctx.part_sz_sct;
+
+		if((s32) file_idx != ctx.active_file_idx) {
+			char name[3];
+			if(file_idx < 10){
+				strcpy(name, "0");
+			}
+			itoa(file_idx, name + strlen(name), 10);
+
+			res = file_based_storage_change_file(name, file_idx);
+			if(res != FR_OK){
+				return 0;
+			}
+		}
+
+		res = file_based_storage_readwrite_single(offset, sct_cnt, buf + ((u64)(num_sectors - scts_left) << 9), is_write);
+		if(res != FR_OK){
+			return 0;
+		}
+
+		cur_sct += sct_cnt;
+		scts_left -= sct_cnt;
+	}
+
+	f_sync(&ctx.active_file);
+	return 1;
+}
+
+int file_based_storage_read(u32 sector, u32 num_sectors, void *buf) {
+	return file_based_storage_readwrite(sector, num_sectors, buf, false);
+}
+
+int file_based_storage_write(u32 sector, u32 num_sectors, void *buf) {
+	return file_based_storage_readwrite(sector, num_sectors, buf, true);
+}
+
+u32 file_based_storage_get_total_size() {
+	u32 total_size_sct = 0;
+	char file_path[0x80];
+	u32 cur_idx = 0;
+	int res;
+
+	strcpy(file_path, ctx.base_path);
+	strcpy(file_path + ctx.base_path_len, "00");
+
+	FILINFO fi;
+	res = f_stat(file_path, &fi);
+
+	while(res == FR_OK){
+		cur_idx++;
+		total_size_sct += fi.fsize >> 9;
+
+		char name[3] = "0";
+		if(cur_idx >= 10){
+			name[0] = '\0';
+		}
+		itoa(cur_idx, name + strlen(name), 10);
+
+		strcpy(file_path + ctx.base_path_len, name);
+
+		res = f_stat(file_path, &fi);
+	}
+
+	return total_size_sct;
+}
--- a/bdk/storage/file_based_storage.h
+++ b/bdk/storage/file_based_storage.h
@@ -0,0 +1,15 @@
+#ifndef _FILE_BASED_STORAGE_H
+#define _FILE_BASED_STORAGE_H
+
+#include <bdk.h>
+
+
+int file_based_storage_init(const char *base_path);
+void file_based_storage_end();
+
+int file_based_storage_read(u32 sector, u32 num_sectors, void *buf);
+int file_based_storage_write(u32 sector, u32 num_sectors, void *buf);
+
+u32 file_based_storage_get_total_size();
+
+#endif
--- a/bdk/storage/sdmmc.h
+++ b/bdk/storage/sdmmc.h
@@ -35,6 +35,7 @@ typedef enum _sdmmc_type
 	MMC_EMUMMC_RAW_SD    = 3,
 	MMC_EMUMMC_RAW_EMMC  = 4,
 	MMC_EMUMMC_FILE_EMMC = 5,
+	MMC_FILE_BASED       = 6,

 	EMMC_GPP   = 0,
 	EMMC_BOOT0 = 1,
--- a/bdk/usb/usb_gadget_ums.c
+++ b/bdk/usb/usb_gadget_ums.c
@@ -21,6 +21,7 @@

 #include <storage/emmc.h>
 #include <storage/emummc_file_based.h>
+#include <storage/file_based_storage.h>
 #include <string.h>

 #include <usb/usbd.h>
@@ -500,6 +501,10 @@ static int _scsi_read(usbd_gadget_ums_t *ums, bulk_ctxt_t *bulk_ctxt)
 		if(ums->lun.storage){
 			if (!sdmmc_storage_read(ums->lun.storage, ums->lun.offset + lba_offset, amount, sdmmc_buf))
 				amount = 0;
+		}else if (ums->lun.type == MMC_FILE_BASED) {
+			if(!file_based_storage_read(ums->lun.offset + lba_offset, amount, sdmmc_buf)){
+				amount = 0;
+			}
 		}else{
 			if(!emummc_storage_file_based_read(ums->lun.offset + lba_offset, amount, sdmmc_buf)){
 				amount = 0;
@@ -662,6 +667,10 @@ static int _scsi_write(usbd_gadget_ums_t *ums, bulk_ctxt_t *bulk_ctxt)
 				if (!sdmmc_storage_write(ums->lun.storage, ums->lun.offset + lba_offset,
 					amount >> UMS_DISK_LBA_SHIFT, (u8 *)bulk_ctxt->bulk_out_buf))
 					amount = 0;
+			}else if(ums->lun.type == MMC_FILE_BASED){
+				if(!file_based_storage_write(ums->lun.offset + lba_offset, amount >> UMS_DISK_LBA_SHIFT, (u8*)bulk_ctxt->bulk_out_buf)){
+					amount = 0;
+				}
 			}else{
 				if(!emummc_storage_file_based_write(ums->lun.offset + lba_offset, amount >> UMS_DISK_LBA_SHIFT, (u8*)bulk_ctxt->bulk_out_buf)){
 					amount = 0;
@@ -739,6 +748,10 @@ static int _scsi_verify(usbd_gadget_ums_t *ums, bulk_ctxt_t *bulk_ctxt)
 		if(ums->lun.storage){
 			if (!sdmmc_storage_read(ums->lun.storage, ums->lun.offset + lba_offset, amount, bulk_ctxt->bulk_in_buf))
 				amount = 0;
+		}else if(ums->lun.type == MMC_FILE_BASED){
+			if(!file_based_storage_read(ums->lun.offset + lba_offset, amount, bulk_ctxt->bulk_in_buf)){
+				amount = 0;
+			}
 		}else{
 			if(!emummc_storage_file_based_read(ums->lun.offset + lba_offset, amount, bulk_ctxt->bulk_in_buf)){
 				amount = 0;
@@ -1934,6 +1947,10 @@ int usb_device_gadget_ums(usb_ctxt_t *usbs)
 		}
 		ums.lun.storage = NULL;
 		ums.lun.sdmmc = NULL;
+	}else if(usbs->type == MMC_FILE_BASED){
+		// file based must be initialized at this point
+		ums.lun.storage = NULL;
+		ums.lun.sdmmc = NULL;
 	} else{
 		if (!emmc_initialize(false))
 		{
@@ -1980,6 +1997,9 @@ int usb_device_gadget_ums(usb_ctxt_t *usbs)
 		case MMC_EMUMMC_RAW_EMMC:
 			ums.set_text(ums.label, "#FFDD00 No sector count set for emuMMC!#");
 			break;
+		case MMC_FILE_BASED:
+			ums.set_text(ums.label, "#FFDD00 No sector count set for emuSD!#");
+			break;
 		}
 	}

--- a/bootloader/hos/hos.c
+++ b/bootloader/hos/hos.c
@@ -782,9 +782,15 @@ void hos_launch(ini_sec_t *cfg)
 		goto error;
 	}

+	gfx_con.mute = false;
+	if (emusd_storage_init_mmc() || !emusd_mount()) {
+		_hos_crit_error("error: Failed to init emuSD.");
+
+		goto error;
+	}
+
 	// Check if SD Card is GPT.
-	// TODO: not relevant with emuSD
-	if (sd_is_gpt())
+	if (emusd_is_gpt())
 	{
 		_hos_crit_error("SD has GPT only! Run Fix Hybrid MBR!");
 		goto error;
@@ -804,6 +810,8 @@ void hos_launch(ini_sec_t *cfg)
 		if (ctxt.stock && (h_cfg.t210b01 || !tools_autorcm_enabled()))
 		{
 			sdram_src_pllc(false);
+			emummc_storage_end();
+			emusd_storage_end();
 			emmc_end();

 			WPRINTF("\nRebooting to OFW in 5s...");
@@ -1053,7 +1061,7 @@ void hos_launch(ini_sec_t *cfg)
 	{
 		bool exfat_compat = _get_fs_exfat_compatible(&kip1_info, &ctxt.exo_ctx.hos_revision);

-		if (sd_fs.fs_type == FS_EXFAT && !exfat_compat)
+		if (emusd_get_fs_type() == FS_EXFAT && !exfat_compat)
 		{
 			_hos_crit_error("SD Card is exFAT but installed HOS driver\nonly supports FAT32!");

@@ -1086,6 +1094,8 @@ void hos_launch(ini_sec_t *cfg)
 		config_exosphere(&ctxt, warmboot_base);

 	// Unmount SD card and eMMC.
+	emummc_storage_end();
+	emusd_storage_end();
 	boot_storage_end();
 	sd_end();
 	emmc_end();
@@ -1201,6 +1211,8 @@ void hos_launch(ini_sec_t *cfg)
 error:
 	_free_launch_components(&ctxt);
 	sdram_src_pllc(false);
+	emummc_storage_end();
+	emusd_storage_end();
 	emmc_end();

 	EPRINTF("\nFailed to launch HOS!");
--- a/bootloader/hos/hos_config.c
+++ b/bootloader/hos/hos_config.c
@@ -16,6 +16,7 @@
 */

 #include <storage/boot_storage.h>
+#include "../storage/emusd.h"
 #include <string.h>

 #include <bdk.h>
@@ -30,7 +31,7 @@

 static int _config_warmboot(launch_ctxt_t *ctxt, const char *value)
 {
-	ctxt->warmboot = boot_storage_file_read(value, &ctxt->warmboot_size);
+	ctxt->warmboot = emusd_file_read(value, &ctxt->warmboot_size);
 	if (!ctxt->warmboot)
 		return 0;

@@ -39,7 +40,7 @@ static int _config_warmboot(launch_ctxt_t *ctxt, const char *value)

 static int _config_secmon(launch_ctxt_t *ctxt, const char *value)
 {
-	ctxt->secmon = boot_storage_file_read(value, &ctxt->secmon_size);
+	ctxt->secmon = emusd_file_read(value, &ctxt->secmon_size);
 	if (!ctxt->secmon)
 		return 0;

@@ -48,7 +49,7 @@ static int _config_secmon(launch_ctxt_t *ctxt, const char *value)

 static int _config_kernel(launch_ctxt_t *ctxt, const char *value)
 {
-	ctxt->kernel = boot_storage_file_read(value, &ctxt->kernel_size);
+	ctxt->kernel = emusd_file_read(value, &ctxt->kernel_size);
 	if (!ctxt->kernel)
 		return 0;

@@ -62,7 +63,8 @@ static int _config_kip1(launch_ctxt_t *ctxt, const char *value)
 	if (value[strlen(value) - 1] == '*')
 	{
 		char *dir = (char *)malloc(256);
-		strcpy(dir, value);
+		strcpy(dir, "emusd:");
+		strcat(dir, value);

 		u32 dirlen = 0;
 		dir[strlen(dir) - 2] = 0;
@@ -82,7 +84,7 @@ static int _config_kip1(launch_ctxt_t *ctxt, const char *value)
 				strcpy(dir + dirlen, filelist->name[i]);

 				merge_kip_t *mkip1 = (merge_kip_t *)malloc(sizeof(merge_kip_t));
-				mkip1->kip1 = boot_storage_file_read(dir, &size);
+				mkip1->kip1 = emusd_file_read(dir + 6, &size);
 				if (!mkip1->kip1)
 				{
 					free(mkip1);
@@ -104,7 +106,7 @@ static int _config_kip1(launch_ctxt_t *ctxt, const char *value)
 	else
 	{
 		merge_kip_t *mkip1 = (merge_kip_t *)malloc(sizeof(merge_kip_t));
-		mkip1->kip1 = boot_storage_file_read(value, &size);
+		mkip1->kip1 = emusd_file_read(value, &size);
 		if (!mkip1->kip1)
 		{
 			free(mkip1);
@@ -263,7 +265,7 @@ static int _config_pkg3(launch_ctxt_t *ctxt, const char *value)

 static int _config_exo_fatal_payload(launch_ctxt_t *ctxt, const char *value)
 {
-	ctxt->exofatal = boot_storage_file_read(value, &ctxt->exofatal_size);
+	ctxt->exofatal = emusd_file_read(value, &ctxt->exofatal_size);
 	if (!ctxt->exofatal)
 		return 0;

--- a/bootloader/hos/pkg1.c
+++ b/bootloader/hos/pkg1.c
@@ -18,6 +18,7 @@
 */

 #include <storage/boot_storage.h>
+#include "../storage/emusd.h"
 #include <string.h>
 #include <stdlib.h>

@@ -370,13 +371,13 @@ int pkg1_warmboot_config(void *hos_ctxt, u32 warmboot_base, u32 fuses_fw, u8 kb)
 		if (!ctxt->warmboot)
 		{
 			char path[128];
-			strcpy(path, "warmboot_mariko/wb_");
+			strcpy(path, "emusd:warmboot_mariko/wb_");
 			_warmboot_filename(path, fuses_fw);

 			// Check if warmboot fw exists and save it.
 			if (ctxt->warmboot_size && f_stat(path, NULL))
 			{
-				f_mkdir("warmboot_mariko");
+				f_mkdir("emusd:warmboot_mariko");
 				sd_save_to_file((void *)warmboot_base, ctxt->warmboot_size, path);
 			}

@@ -389,7 +390,7 @@ int pkg1_warmboot_config(void *hos_ctxt, u32 warmboot_base, u32 fuses_fw, u8 kb)
 					_warmboot_filename(path, burnt_fuses);
 					if (!f_stat(path, NULL))
 					{
-						ctxt->warmboot = boot_storage_file_read(path, &ctxt->warmboot_size);
+						ctxt->warmboot = emusd_file_read(path + 6, &ctxt->warmboot_size);
 						burnt_fuses = tmp_fuses;
 						break;
 					}
--- a/bootloader/hos/pkg2.c
+++ b/bootloader/hos/pkg2.c
@@ -77,6 +77,7 @@ static void parse_external_kip_patches()
 		return;

 	LIST_INIT(ini_kip_sections);
+	// TODO: load frome emusd?
 	if (ini_patch_parse(&ini_kip_sections, "bootloader/patches.ini"))
 	{
 		// Copy ids into a new patchset.
--- a/bootloader/hos/pkg3.c
+++ b/bootloader/hos/pkg3.c
@@ -17,6 +17,7 @@
 */

 #include <storage/boot_storage.h>
+#include "../storage/emusd.h"
 #include <string.h>

 #include <bdk.h>
@@ -87,9 +88,9 @@ typedef struct _pkg3_content_t

 static void _pkg3_update_r2p()
 {
-	u8 *r2p_payload = boot_storage_file_read("atmosphere/reboot_payload.bin", NULL);
+	u8 *r2p_payload = emusd_file_read("atmosphere/reboot_payload.bin", NULL);

-	is_ipl_updated(r2p_payload, "atmosphere/reboot_payload.bin", h_cfg.updater2p ? true : false);
+	is_ipl_updated(r2p_payload, "emusd:atmosphere/reboot_payload.bin", h_cfg.updater2p ? true : false);

 	free(r2p_payload);
 }
@@ -127,6 +128,10 @@ static int _pkg3_kip1_skip(char ***pkg3_kip1_skip, u32 *pkg3_kip1_skip_num, char

 int parse_pkg3(launch_ctxt_t *ctxt, const char *path)
 {
+	char *path1 = (char *)malloc(256);
+	strcpy(path1, "emusd:");
+	strcat(path1, path);
+
 	FIL fp;

 	char **pkg3_kip1_skip = NULL;
@@ -154,16 +159,25 @@ int parse_pkg3(launch_ctxt_t *ctxt, const char *path)
 	}

 #ifdef HOS_MARIKO_STOCK_SECMON
-	if (stock && emummc_disabled && (pkg1_old || h_cfg.t210b01))
+	if (stock && emummc_disabled && (pkg1_old || h_cfg.t210b01)) {
+		free(path1);
 		return 1;
+	}
+
 #else
-	if (stock && emummc_disabled && pkg1_old)
+	if (stock && emummc_disabled && pkg1_old) {
+		free(path1);
 		return 1;
+	}
+
 #endif

 	// Try to open PKG3.
-	if (f_open(&fp, path, FA_READ) != FR_OK)
+	if (f_open(&fp, path1, FA_READ) != FR_OK) {
+		free(path1);
 		return 0;
+	}
+

 	void *pkg3 = malloc(f_size(&fp));

@@ -269,6 +283,7 @@ int parse_pkg3(launch_ctxt_t *ctxt, const char *path)
 		_pkg3_update_r2p();

 		free(pkg3_kip1_skip);
+		free(path1);

 		return 1;
 	}
--- a/bootloader/hos/secmon_exo.c
+++ b/bootloader/hos/secmon_exo.c
@@ -77,6 +77,7 @@ typedef struct
 	union 
 	{
 		emummc_partition_config_t partition_cfg;
+		emummc_file_config_t file_cfg;
 	};
 } emummc_sd_config_t;

@@ -226,7 +227,7 @@ void config_exosphere(launch_ctxt_t *ctxt, u32 warmboot_base)
 	if (!ctxt->stock)
 	{
 		LIST_INIT(ini_exo_sections);
-		if (ini_parse(&ini_exo_sections, "exosphere.ini", false))
+		if (ini_parse(&ini_exo_sections, "emusd:exosphere.ini", false))
 		{
 			LIST_FOREACH_ENTRY(ini_sec_t, ini_sec, &ini_exo_sections, link)
 			{
@@ -265,7 +266,7 @@ void config_exosphere(launch_ctxt_t *ctxt, u32 warmboot_base)
 		if (!ctxt->exo_ctx.usb3_force)
 		{
 			LIST_INIT(ini_sys_sections);
-			if (ini_parse(&ini_sys_sections, "atmosphere/config/system_settings.ini", false))
+			if (ini_parse(&ini_sys_sections, "emusd:atmosphere/config/system_settings.ini", false))
 			{
 				LIST_FOREACH_ENTRY(ini_sec_t, ini_sec, &ini_sys_sections, link)
 				{
@@ -375,12 +376,27 @@ void config_exosphere(launch_ctxt_t *ctxt, u32 warmboot_base)
 	{
 		exo_cfg->emummc_cfg.sd_cfg.base_cfg.fs_ver = emu_sd_cfg.fs_ver;
 		exo_cfg->emummc_cfg.sd_cfg.partition_cfg.start_sector = emu_sd_cfg.sector;
-		if(emu_sd_cfg.enabled == 4 && emu_sd_cfg.sector) {
+		if (emu_sd_cfg.enabled == 4 && emu_sd_cfg.sector) {
+			// emmc partition based
 			exo_cfg->emummc_cfg.sd_cfg.base_cfg.type = EmummcType_Partition_Emmc;
-		}else {
+		} else if (emu_sd_cfg.enabled == 4 && !emu_sd_cfg.sector) {
+			// emmc file based
+			exo_cfg->emummc_cfg.sd_cfg.base_cfg.type = EmummcType_File_Emmc;
+		} else if (emu_sd_cfg.enabled == 1 && emu_sd_cfg.sector) {
+			// sd partition based
+			exo_cfg->emummc_cfg.sd_cfg.base_cfg.type = EmummcType_Partition_Sd;
+		} else if (emu_sd_cfg.enabled == 1 && !emu_sd_cfg.sector) {
+			// sd file based
+			exo_cfg->emummc_cfg.sd_cfg.base_cfg.type = EmummcType_File_Sd;
+		} else {
+			// disabled
 			exo_cfg->emummc_cfg.sd_cfg.base_cfg.type = EmummcType_None;
 		}

+		if (emu_sd_cfg.sector)
+			exo_cfg->emummc_cfg.sd_cfg.partition_cfg.start_sector = emu_sd_cfg.sector;
+		else
+			strcpy((char *)exo_cfg->emummc_cfg.sd_cfg.file_cfg.path, emu_sd_cfg.path);
 	} else {
 		exo_cfg->emummc_cfg.sd_cfg.base_cfg.type = EmummcType_None;
 	}
--- a/bootloader/libs/fatfs/diskio.c
+++ b/bootloader/libs/fatfs/diskio.c
@@ -7,9 +7,9 @@
 /* storage control modules to the FatFs module with a defined API.       */
 /*-----------------------------------------------------------------------*/

+#include "../../storage/emusd.h"
 #include <storage/sd.h>
 #include <storage/sdmmc.h>
-#include <string.h>

 #include <bdk.h>

@@ -28,6 +28,8 @@ static bool ensure_partition(BYTE pdrv){
 	case DRIVE_EMMC:
 		part = EMMC_GPP;
 		break;
+	case DRIVE_EMUSD:
+		return true;
 	default:
 		return false;
 	}
@@ -86,6 +88,9 @@ DRESULT disk_read (
 			storage = &emmc_storage;
 			actual_sector = sector + (0x100000 / 512);
 			break;
+		case DRIVE_EMUSD:
+			return emusd_storage_read(sector, count, buff) ? RES_OK : RES_ERROR;
+			break;
 		default:
 			return RES_ERROR;

@@ -122,6 +127,8 @@ DRESULT disk_write (
 			storage = &emmc_storage;
 			actual_sector = sector + (0x100000 / 512);
 			break;
+		case DRIVE_EMUSD:
+			return emusd_storage_write(sector, count, (void*)buff) ? RES_OK : RES_ERROR;
 		default:
 			return RES_ERROR;

--- a/bootloader/libs/fatfs/ffconf.h
+++ b/bootloader/libs/fatfs/ffconf.h
@@ -179,12 +179,12 @@
 / Drive/Volume Configurations
 /---------------------------------------------------------------------------*/

-#define FF_VOLUMES		4
+#define FF_VOLUMES		5
 /* Number of volumes (logical drives) to be used. (1-10) */


 #define FF_STR_VOLUME_ID	1
-#define FF_VOLUME_STRS		"sd", "boot1", "boot1_1mb", "emmc"
+#define FF_VOLUME_STRS		"sd", "boot1", "boot1_1mb", "emmc", "emusd"
 /* FF_STR_VOLUME_ID switches support for volume ID in arbitrary strings.
 /  When FF_STR_VOLUME_ID is set to 1 or 2, arbitrary strings can be used as drive
 /  number in the path name. FF_VOLUME_STRS defines the volume ID strings for each
@@ -306,6 +306,7 @@ typedef enum {
 	DRIVE_BOOT1     = 1,
 	DRIVE_BOOT1_1MB = 2,
 	DRIVE_EMMC      = 3,
+	DRIVE_EMUSD     = 4,
 } DDRIVE;

 /*--- End of configuration options ---*/
--- a/bootloader/main.c
+++ b/bootloader/main.c
@@ -418,7 +418,8 @@ static void _launch_ini_list()
 			}

 			if (emusd_path && !emusd_set_path(emusd_path)){
-				EPRINTF("emusdpath is wrong!");
+				EPRINTFARGS("path: %s", emusd_path);
+				EPRINTF("error: emusdpath is wrong!");
 				goto wrong_emupath;
 			}
 		}
@@ -579,7 +580,8 @@ static void _launch_config()

 		if (emusd_path && !emusd_set_path(emusd_path))
 		{
-			EPRINTF("emusdpath is wrong!");
+			EPRINTFARGS("path: %s", emusd_path);
+			EPRINTF("error: emusdpath is wrong!");
 			goto wrong_emupath;
 		}
 	}
@@ -1056,7 +1058,8 @@ skip_list:
 		if (emusd_path && !emusd_set_path(emusd_path))
 		{
 			gfx_con.mute = false;
-			EPRINTF("emusdpath is wrong!");
+			EPRINTFARGS("path: %s", emusd_path);
+			EPRINTF("error: emusdpath is wrong!");
 			goto wrong_emupath;
 		}

--- a/bootloader/storage/emummc.c
+++ b/bootloader/storage/emummc.c
@@ -24,7 +24,6 @@

 #include "emummc.h"
 #include "../config.h"
-#include "gfx_utils.h"
 #include <libs/fatfs/ff.h>
 #include <storage/emummc_file_based.h>

@@ -174,11 +173,6 @@ static int emummc_raw_get_part_off(int part_idx)

 int emummc_storage_init_mmc()
 {
-	gfx_con.mute = false;
-
-
-	gfx_printf("en %d path %s\n", emu_cfg.enabled, emu_cfg.path);
-
 	// FILINFO fno;
 	emu_cfg.active_part = 0;

@@ -263,33 +257,6 @@ int emummc_storage_read(u32 sector, u32 num_sectors, void *buf)
 	else
 	{
 		return emummc_storage_file_based_read(sector, num_sectors, buf);
-		// if (!emu_cfg.active_part)
-		// {
-		// 	u32 file_part = sector / emu_cfg.file_based_part_size;
-		// 	sector = sector % emu_cfg.file_based_part_size;
-		// 	if (file_part >= 10)
-		// 		itoa(file_part, emu_cfg.emummc_file_based_path + strlen(emu_cfg.emummc_file_based_path) - 2, 10);
-		// 	else
-		// 	{
-		// 		emu_cfg.emummc_file_based_path[strlen(emu_cfg.emummc_file_based_path) - 2] = '0';
-		// 		itoa(file_part, emu_cfg.emummc_file_based_path + strlen(emu_cfg.emummc_file_based_path) - 1, 10);
-		// 	}
-		// }
-		// if (f_open(&fp, emu_cfg.emummc_file_based_path, FA_READ))
-		// {
-		// 	EPRINTF("Failed to open emuMMC image.");
-		// 	return 0;
-		// }
-		// f_lseek(&fp, (u64)sector << 9);
-		// if (f_read(&fp, buf, (u64)num_sectors << 9, NULL))
-		// {
-		// 	EPRINTF("Failed to read emuMMC image.");
-		// 	f_close(&fp);
-		// 	return 0;
-		// }
-
-		// f_close(&fp);
-		// return 1;
 	}

 	return 1;
@@ -310,31 +277,6 @@ int emummc_storage_write(u32 sector, u32 num_sectors, void *buf)
 	else
 	{
 		return emummc_storage_file_based_write(sector, num_sectors, buf);
-		// if (!emu_cfg.active_part)
-		// {
-		// 	u32 file_part = sector / emu_cfg.file_based_part_size;
-		// 	sector = sector % emu_cfg.file_based_part_size;
-		// 	if (file_part >= 10)
-		// 		itoa(file_part, emu_cfg.emummc_file_based_path + strlen(emu_cfg.emummc_file_based_path) - 2, 10);
-		// 	else
-		// 	{
-		// 		emu_cfg.emummc_file_based_path[strlen(emu_cfg.emummc_file_based_path) - 2] = '0';
-		// 		itoa(file_part, emu_cfg.emummc_file_based_path + strlen(emu_cfg.emummc_file_based_path) - 1, 10);
-		// 	}
-		// }
-
-		// if (f_open(&fp, emu_cfg.emummc_file_based_path, FA_WRITE))
-		// 	return 0;
-
-		// f_lseek(&fp, (u64)sector << 9);
-		// if (f_write(&fp, buf, (u64)num_sectors << 9, NULL))
-		// {
-		// 	f_close(&fp);
-		// 	return 0;
-		// }
-
-		// f_close(&fp);
-		// return 1;
 	}
 }

--- a/bootloader/storage/emusd.c
+++ b/bootloader/storage/emusd.c
@@ -1,9 +1,26 @@
 #include "emusd.h"
 #include <bdk.h>
+#include <storage/boot_storage.h>
+#include <storage/emmc.h>
+#include <storage/file_based_storage.h>
+#include <storage/sd.h>
+#include <storage/sdmmc.h>
 #include <string.h>
 #include <utils/ini.h>
+#include <libs/fatfs/ff.h>
+#include "../config.h"
+#include "gfx_utils.h"

+
+FATFS emusd_fs;
+bool emusd_mounted = false;
+bool emusd_initialized = false;
 emusd_cfg_t emu_sd_cfg = {0};
+extern hekate_config h_cfg;
+
+static bool emusd_get_mounted() {
+	return emusd_mounted;
+}

 void emusd_load_cfg()
 {
@@ -14,7 +31,7 @@ void emusd_load_cfg()
 	if(!emu_sd_cfg.path) {
 		emu_sd_cfg.path = (char*)malloc(0x200);
 	}
-	if(emu_sd_cfg.emummc_file_based_path){
+	if(!emu_sd_cfg.emummc_file_based_path){
 		emu_sd_cfg.emummc_file_based_path = (char*)malloc(0x200);
 	}

@@ -35,6 +52,8 @@ void emusd_load_cfg()
 						emu_sd_cfg.enabled = atoi(kv->val);
 					} else if(!strcmp(kv->key, "sector")){
 						emu_sd_cfg.sector = strtol(kv->val, NULL, 16);
+					} else if(!strcmp(kv->key, "path")){
+						emu_sd_cfg.path = kv->val;
 					}
 				}
 				break;
@@ -43,19 +62,46 @@ void emusd_load_cfg()
 	}
 }

+bool emusd_mount() {
+	if (emusd_mounted) {
+		return true;
+	}
+
+	if (emusd_storage_init_mmc()){
+		return false;
+	}
+
+	int res = f_mount(&emusd_fs, "emusd:", 1);
+
+	if(res) {
+		EPRINTFARGS("emusd mount fail %d", res);
+		return false;
+	}
+	return true;
+}
+
+bool emusd_unmount() {
+	f_mount(NULL, "emusd:", 1);
+	emusd_mounted = false;
+	return true;
+}
+
 bool emusd_set_path(char *path) {
+	gfx_con.mute = false;
 	FIL fp;
 	bool found = false;
-	char sd_path[0x80];
-
 	// TODO: use emu_sd.file_path  instead
-	strcpy(sd_path, path);
-	strcat(sd_path, "/raw_emmc_based");
-
-	if(!f_open(&fp, sd_path, FA_READ))
+	strcat(emu_sd_cfg.emummc_file_based_path, "");
+	strcpy(emu_sd_cfg.emummc_file_based_path, path);
+	strcat(emu_sd_cfg.emummc_file_based_path, "/raw_emmc_based");
+	gfx_printf("1 %s \n", emu_sd_cfg.emummc_file_based_path);
+	if(!f_open(&fp, emu_sd_cfg.emummc_file_based_path, FA_READ))
 	{
+		gfx_printf("open done\n");
 		if(!f_read(&fp, &emu_sd_cfg.sector, 4, NULL)){
+			gfx_printf("found sct\n");
 			if(emu_sd_cfg.sector){
+				gfx_printf("!=0\n");
 				found = true;
 				emu_sd_cfg.enabled = 4;
 				goto out;
@@ -63,8 +109,198 @@ bool emusd_set_path(char *path) {
 		}
 	}

-	// TODO: file based / SD partition based support
+	strcpy(emu_sd_cfg.emummc_file_based_path, "");
+	strcat(emu_sd_cfg.emummc_file_based_path, path);
+	strcat(emu_sd_cfg.emummc_file_based_path, "/raw_emmc_based");
+	gfx_printf("1 %s \n", emu_sd_cfg.emummc_file_based_path);
+	if (!f_open(&fp, emu_sd_cfg.emummc_file_based_path, FA_READ))
+	{
+		gfx_printf("open done\n");
+		if (!f_read(&fp, &emu_sd_cfg.sector, 4, NULL)){
+				gfx_printf("found sct\n");
+			if (emu_sd_cfg.sector){
+				gfx_printf("!=0\n");
+				found = true;
+				emu_sd_cfg.enabled = 4;
+				goto out;
+			}
+		}
+	}

-	out:
+	// strcpy(emu_sd_cfg.emummc_file_based_path, "sd:");
+	strcpy(emu_sd_cfg.emummc_file_based_path, "");
+	strcat(emu_sd_cfg.emummc_file_based_path, path);
+	strcat(emu_sd_cfg.emummc_file_based_path, "/file_based");
+	gfx_printf("1 %s \n", emu_sd_cfg.emummc_file_based_path);
+	if (!f_stat(emu_sd_cfg.emummc_file_based_path, NULL))
+	{
+		gfx_printf("open done\n");
+		emu_sd_cfg.sector = 0;
+		emu_sd_cfg.path = path;
+		emu_sd_cfg.enabled = 1;
+
+		gfx_printf("path %s\n", emu_sd_cfg.path);
+		found = true;
+		goto out;
+	}
+
+	// strcpy(emu_sd_cfg.emummc_file_based_path, "sd:");
+	strcpy(emu_sd_cfg.emummc_file_based_path, "");
+	strcat(emu_sd_cfg.emummc_file_based_path, path);
+	strcat(emu_sd_cfg.emummc_file_based_path, "/file_emmc_based");
+	gfx_printf("1 %s \n", emu_sd_cfg.emummc_file_based_path);
+	if (!f_stat(emu_sd_cfg.emummc_file_based_path, NULL))
+	{
+		gfx_printf("open done\n");
+		emu_sd_cfg.sector = 0;
+		emu_sd_cfg.path = path;
+		emu_sd_cfg.enabled = 4;
+
+		gfx_printf("path %s\n", emu_sd_cfg.path);
+		found = true;
+		goto out;
+	}
+
+out:
 	return found;
+}
+
+int emusd_storage_init_mmc() {
+	if(!emusd_initialized) {
+		if (!emu_sd_cfg.enabled || h_cfg.emummc_force_disable) {
+			return 0;
+		}
+
+		bool file_based = false;
+		if(emu_sd_cfg.enabled == 4){
+			if(!emu_sd_cfg.sector){
+				//file based
+				if(!emmc_mount()){
+					return 1;
+				}
+				strcpy(emu_sd_cfg.emummc_file_based_path, "emmc:");
+				strcat(emu_sd_cfg.emummc_file_based_path, emu_sd_cfg.path);
+				strcat(emu_sd_cfg.emummc_file_based_path, "/SD/");
+				file_based = true;
+			}else{
+				if(!emmc_initialize(false)){
+					return 1;
+				}
+			}
+		}else{
+			if(!emu_sd_cfg.sector){
+				//file based
+				if(!sd_mount()){
+					return 1;
+				}
+				strcpy(emu_sd_cfg.emummc_file_based_path, "sd:");
+				strcat(emu_sd_cfg.emummc_file_based_path, emu_sd_cfg.path);
+				strcat(emu_sd_cfg.emummc_file_based_path, "/SD/");
+				file_based = true;
+			}else{
+				if(!sd_initialize(false)){
+					return 1;
+				}
+			}
+		}
+
+		if(file_based){
+			return file_based_storage_init(emu_sd_cfg.emummc_file_based_path) == 0;
+		}
+
+		emusd_initialized = true;
+	}
+	return 0;
+}
+
+int emusd_storage_end() {
+	if(!h_cfg.emummc_force_disable && emu_sd_cfg.enabled && !emu_sd_cfg.sector){
+		file_based_storage_end();
+	}
+	if(!emu_sd_cfg.enabled || h_cfg.emummc_force_disable || emu_sd_cfg.enabled == 1){
+		sd_unmount();
+	}else{
+		emmc_unmount();
+	}
+	emusd_initialized = false;
+	return 0;
+}
+
+int emusd_storage_write(u32 sector, u32 num_sectors, void *buf) {
+	if(!emu_sd_cfg.enabled || h_cfg.emummc_force_disable){
+		return sdmmc_storage_write(&sd_storage, sector, num_sectors, buf);
+	}else if(emu_sd_cfg.sector){
+		sdmmc_storage_t *storage = emu_sd_cfg.enabled == 1 ? &sd_storage : &emmc_storage;
+		sector += emu_sd_cfg.sector;
+		return sdmmc_storage_write(storage, sector, num_sectors, buf);
+	}else{
+		return file_based_storage_write(sector, num_sectors, buf);
+	}
+}
+
+int emusd_storage_read(u32 sector, u32 num_sectors, void *buf) {
+	if(!emu_sd_cfg.enabled || h_cfg.emummc_force_disable){
+		return sdmmc_storage_read(&sd_storage, sector, num_sectors, buf);
+	}else if(emu_sd_cfg.sector){
+		sdmmc_storage_t *storage = emu_sd_cfg.enabled == 1 ? &sd_storage : &emmc_storage;
+		sector += emu_sd_cfg.sector;
+		return sdmmc_storage_read(storage, sector, num_sectors, buf);
+	}else{
+		return file_based_storage_read(sector, num_sectors, buf);
+	}
+}
+
+sdmmc_storage_t *emusd_get_storage() {
+	return emu_sd_cfg.enabled == 4 ? &emmc_storage : &sd_storage;
+}
+
+
+bool emusd_is_gpt() {
+	if(emu_sd_cfg.enabled) {
+		return emusd_fs.part_type;
+	} else {
+		return sd_fs.part_type;
+	}
+}
+
+int emusd_get_fs_type() {
+	if(emu_sd_cfg.enabled) {
+		return emusd_fs.fs_type;
+	} else {
+		return sd_fs.fs_type;
+	}
+}
+
+void *emusd_file_read(const char *path, u32 *fsize) {
+	if(emu_sd_cfg.enabled) {
+		char *path1 = malloc(0x100);
+		strcpy(path1, "emusd:");
+		strcat(path1, path);
+		FIL fp;
+		if (!emusd_get_mounted())
+			return NULL;
+
+		if (f_open(&fp, path, FA_READ) != FR_OK)
+			return NULL;
+
+		u32 size = f_size(&fp);
+		if (fsize)
+			*fsize = size;
+
+		void *buf = malloc(size);
+
+		if (f_read(&fp, buf, size, NULL) != FR_OK)
+		{
+			free(buf);
+			f_close(&fp);
+
+			return NULL;
+		}
+
+		f_close(&fp);
+
+		return buf;
+	} else {
+		return boot_storage_file_read(path, fsize);
+	}
 }
--- a/bootloader/storage/emusd.h
+++ b/bootloader/storage/emusd.h
@@ -40,5 +40,10 @@ int  emusd_storage_end();
 int  emusd_storage_read(u32 sector, u32 num_sectors, void *buf);
 int  emusd_storage_write(u32 sector, u32 num_sectors, void *buf);
 sdmmc_storage_t *emusd_get_storage();
+bool emusd_is_gpt();
+int emusd_get_fs_type();
+bool emusd_mount();
+bool emusd_unmount();
+void *emusd_file_read(const char *path, u32 *fsize);

 #endif
--- a/nyx/Makefile
+++ b/nyx/Makefile
@@ -41,7 +41,7 @@ OBJS += $(addprefix $(BUILDDIR)/$(TARGET)/, \
 	bm92t36.o bq24193.o max17050.o max7762x.o max77620-rtc.o regulator_5v.o \
 	touch.o joycon.o tmp451.o fan.o \
 	usbd.o xusbd.o usb_descriptors.o usb_gadget_ums.o usb_gadget_hid.o \
-	hw_init.o boot_storage.o sfd.o mbr_gpt.o emummc_file_based.o \
+	hw_init.o boot_storage.o sfd.o mbr_gpt.o emummc_file_based.o file_based_storage.o \
 )

 # Utilities.
--- a/nyx/nyx_gui/frontend/fe_emusd_tools.c
+++ b/nyx/nyx_gui/frontend/fe_emusd_tools.c
@@ -5,11 +5,14 @@
 #include <libs/fatfs/ff.h>
 #include <storage/emmc.h>
 #include <storage/mbr_gpt.h>
+#include <storage/sd.h>
 #include <storage/sdmmc.h>
 #include <utils/list.h>
 #include <utils/ini.h>
 #include <string.h>
+#include "gfx_utils.h"
 #include <stdlib.h>
+#include <utils/sprintf.h>

 void load_emusd_cfg(emusd_cfg_t *emu_info){
 	memset(emu_info, 0, sizeof(emusd_cfg_t));
@@ -29,8 +32,10 @@ void load_emusd_cfg(emusd_cfg_t *emu_info){
 					emu_info->enabled = atoi(kv->val);
 				else if(!strcmp("sector", kv->key))
 					emu_info->sector = strtol(kv->val, NULL, 16);
-				/*else (!strcmp("id",     kv->key))
-					emu_info->id     = strtol(kv->val, NULL, 16);*/
+				else if(!strcmp("path", kv->key)){
+					emu_info->path =(char*)malloc(strlen(kv->val)+1);
+					strcpy(emu_info->path, kv->val);
+				}
 			}

 			break;
@@ -40,7 +45,7 @@ void load_emusd_cfg(emusd_cfg_t *emu_info){
 	ini_free(&ini_sections);
 }

-void save_emusd_cfg(u32 part_idx, u32 sector_start){
+void save_emusd_cfg(u32 part_idx, u32 sector_start, const char *path, u8 drive){
 	boot_storage_mount();

 	char lbuf[16];
@@ -53,7 +58,9 @@ void save_emusd_cfg(u32 part_idx, u32 sector_start){

 	// Add config entry.
 	f_puts("[emusd]\nenabled=", &fp);
-	if(sector_start){
+	if((sector_start || path) && drive == DRIVE_SD) {
+		f_puts("1", &fp);
+	} else if((sector_start || path) && drive == DRIVE_EMMC){
 		f_puts("4", &fp);
 	}else{
 		f_puts("0", &fp);
@@ -66,13 +73,142 @@ void save_emusd_cfg(u32 part_idx, u32 sector_start){
 		itoa(sector_start, lbuf, 16);
 		f_puts(lbuf, &fp);
 	}
-	f_puts("\n", &fp);

+	if(path){
+		f_puts("\npath=", &fp);
+		f_puts(path, &fp);
+	}
+
+	f_puts("\n", &fp);
 	f_close(&fp);
 }

-int create_emusd(int part_idx, u32 sector_mbr, u32 sector_start, u32 sector_size, const char *name){
-	sfd_init(&emmc_storage, sector_start, sector_size);
+static void update_base_path(char *path, int idx, int path_len) {
+	if(idx < 10){
+		path[path_len] = '0';
+		itoa(idx, path + path_len + 1, 10);
+	}else{
+		itoa(idx, path + path_len, 10);
+	}
+}
+
+int create_emusd_file(u32 size_sct, u8 drive) {
+	static const u32 file_max_scts = 0xfe000000 / 0x200;
+
+	char path[0x80];
+	if (drive == DRIVE_SD){
+		strcpy(path, "sd:emuSD/SD");
+		f_mkdir("sd:emuSD");
+	}else {
+		strcpy(path, "emmc:emuSD/EMMC");
+		f_mkdir("emmc:emuSD");
+	}
+	int path_len = strlen(path);
+
+	f_mkdir("emuSD");
+
+	for(int j = 0; j < 100; j++){
+		update_base_path(path, j, path_len);
+		if(f_stat(path, NULL) == FR_NO_FILE){
+			break;
+		}
+	}
+
+	f_mkdir(path);
+	f_mkdir(path + (drive == DRIVE_SD ? 3 : 5));
+
+	u32 base_path_len = strlen(path);
+
+	strcat(path, "/SD");
+	f_mkdir(path);
+
+	strcat(path, "/");
+	path_len = strlen(path);
+
+	// allocate files for emusd
+	u32 sct_left = size_sct;
+	u32 idx = 0;
+
+	gfx_printf("sct left 0x%x\n", sct_left);
+	while(sct_left) {
+		update_base_path(path, idx, path_len);
+
+		u32 scts = MIN(sct_left, file_max_scts);
+
+		FIL f;
+		int res = f_open(&f,  path, FA_CREATE_ALWAYS | FA_WRITE);
+		if(res != FR_OK) {
+			gfx_printf("open fail\n");
+			return 0;
+		}
+
+		FSIZE_t seek_bytes = (FSIZE_t)scts << 9;
+		res = f_lseek(&f, seek_bytes);
+		f_close(&f);
+
+		if(res != FR_OK){
+			f_unlink(path);
+			return 0;
+		}
+
+		sct_left -= scts;
+		idx++;
+	}
+
+
+	path[path_len] = '\0';
+
+	sfd_file_based_init(path);
+
+	u8 *buf = malloc(SZ_4M);
+	u32 cluster_size = 65536;
+
+	int res = f_mkfs("sfd:", FM_FAT32, cluster_size, buf, SZ_4M);
+
+	while (res != FR_OK && cluster_size > 4096){
+		cluster_size /= 2;
+		res = f_mkfs("sfd:", FM_FAT32, cluster_size, buf, SZ_4M);
+	}
+
+	if(res == FR_OK){
+		FATFS fs;
+		res = f_mount(&fs, "sfd:", 1);
+
+		if(res == FR_OK){
+			gfx_printf("mount fail %d\n", res);
+			char label[0x30];
+			strcpy(label, "sfd:emusd");
+			res = f_setlabel(label);
+		}
+
+		f_mount(NULL, "sfd:", 0);
+	}
+
+	sfd_end();
+
+	free(buf);
+
+	if(res != FR_OK) {
+		return 0;
+	}
+
+	path[base_path_len] = '\0';
+	s_printf(path + base_path_len, drive == DRIVE_SD ? "/file_based" : "/file_emmc_based");
+	FIL f;
+	res = f_open(&f, path + (drive == DRIVE_SD ? 3 : 5), FA_WRITE | FA_CREATE_ALWAYS);
+	f_close(&f);
+	gfx_printf("%s %d\n", path, res);
+
+	path[base_path_len] = '\0';
+	save_emusd_cfg(0, 0, path + (drive == DRIVE_SD ? 3 : 5), drive);
+
+	return 1;
+}
+
+int create_emusd(int part_idx, u32 sector_mbr, u32 sector_start, u32 sector_size, const char *name, u8 drive){
+	sdmmc_storage_t *storage = drive == DRIVE_SD ? &sd_storage : &emmc_storage;
+
+	sfd_init(storage, sector_start, sector_size);

 	u8 *buf = malloc(SZ_4M);
 	FIL f;
@@ -109,7 +245,7 @@ int create_emusd(int part_idx, u32 sector_mbr, u32 sector_start, u32 sector_size
 					mbr.partitions[0].size_sct = sector_size;
 					mbr.partitions[0].type = 0x0c;
 				
-					mkfs_error = sdmmc_storage_write(&emmc_storage, sector_mbr, 1, &mbr) ? FR_OK : FR_DISK_ERR;
+					mkfs_error = sdmmc_storage_write(storage, sector_mbr, 1, &mbr) ? FR_OK : FR_DISK_ERR;
 				}
 			}
 		}
@@ -119,5 +255,22 @@ int create_emusd(int part_idx, u32 sector_mbr, u32 sector_start, u32 sector_size

 	sfd_end();

-	return mkfs_error;
+	if(mkfs_error != FR_OK){
+		return mkfs_error;
+	}
+
+	char path[0x80];
+	strcpy(path, "emuSD");
+	f_mkdir(path);
+	s_printf(path + strlen(path), "/RAW_%s%d", drive == DRIVE_SD ? "SD" : "EMMC", part_idx);
+	f_mkdir(path);
+	strcat(path, "/raw_emmc_based");
+
+	f_open(&f, path, FA_CREATE_ALWAYS | FA_WRITE);
+	f_write(&f, &sector_mbr, 4, NULL);
+	f_close(&f);
+
+	save_emusd_cfg(part_idx, sector_mbr, NULL, drive); 
+
+	return FR_OK;
 }
--- a/nyx/nyx_gui/frontend/fe_emusd_tools.h
+++ b/nyx/nyx_gui/frontend/fe_emusd_tools.h
@@ -7,10 +7,11 @@ typedef struct _emusd_cfg_t{
 	// 0: disabled, 1: enabled
 	int enabled;
 	u32 sector;
+	char *path;
 } emusd_cfg_t;

 void load_emusd_cfg(emusd_cfg_t *emu_info);
-void save_emusd_cfg(u32 part_idx, u32 sector_start);
-int create_emusd(int part_idx, u32 sector_mbr, u32 sector_start, u32 sector_size, const char *name);
-
+void save_emusd_cfg(u32 part_idx, u32 sector_start, const char *path, u8 drive);
+int create_emusd(int part_idx, u32 sector_mbr, u32 sector_start, u32 sector_size, const char *name, u8 drive);
+int create_emusd_file(u32 size_sct, u8 drive);
 #endif
--- a/nyx/nyx_gui/frontend/gui_emummc_tools.c
+++ b/nyx/nyx_gui/frontend/gui_emummc_tools.c
@@ -864,7 +864,7 @@ static lv_res_t _create_mbox_emummc_create(lv_obj_t *btn)
 		"Welcome to #C7EA46 emuMMC# creation tool!\n\n"
 		"Please choose what type of emuMMC you want to create.\n"
 		"#FF8000 File based# is saved as files in\nthe SD or eMMC FAT partition.\n"
-		"#FF8000 Partition based# is saved as raw image in a\navailable SD or eMMC partition.");
+		"#FF8000 Partition based# is saved as raw image in an\navailable SD or eMMC partition.");

 	lv_mbox_add_btns(mbox, mbox_btn_map, _create_emummc_select_type_action);

--- a/nyx/nyx_gui/frontend/gui_emusd_tools.c
+++ b/nyx/nyx_gui/frontend/gui_emusd_tools.c
--- a/nyx/nyx_gui/frontend/gui_tools.c
+++ b/nyx/nyx_gui/frontend/gui_tools.c
@@ -37,6 +37,7 @@
 #include <storage/boot_storage.h>
 #include <storage/emmc.h>
 #include <storage/emummc_file_based.h>
+#include <storage/file_based_storage.h>
 #include <storage/mbr_gpt.h>
 #include <storage/sd.h>
 #include <storage/sdmmc.h>
@@ -380,6 +381,12 @@ static lv_res_t _create_mbox_ums_error(int error)
 	case 8:
 		lv_mbox_set_text(mbox, "#FF8000 USB Mass Storage#\n\n#FFFF00 Failed to initialize file based emuMMC!#");
 		break;
+	case 9:
+		lv_mbox_set_text(mbox, "#FF8000 USB Mass Storage#\n\n#FFFF00 Failed to initialize file based emuSD!#");
+		break;
+	case 10:
+		lv_mbox_set_text(mbox, "#FF8000 USB Mass Storage#\n\n#FFFF00 No emuSD found active!#");
+		break;
 	}

 	lv_mbox_add_btns(mbox, mbox_btn_map, mbox_action);
@@ -558,42 +565,103 @@ static lv_res_t _action_ums_emusd(lv_obj_t * btn){
 	}

 	usb_ctxt_t usbs;
+	sdmmc_storage_t *storage;
 	emusd_cfg_t emu_info;

+	bool file_based = false;
 	int error = !boot_storage_mount();
+	char path[0x80];

 	if(!error){
 		load_emusd_cfg(&emu_info);
 		if(emu_info.enabled){
-			if(!emmc_initialize(false)){
-				error = 3;
-			}else{
-				mbr_t mbr = {0};
-
-				if(sdmmc_storage_read(&emmc_storage, emu_info.sector, 1, &mbr)){
-					error = 0;
-					usbs.offset = emu_info.sector;
-					usbs.sectors = mbr.partitions[0].size_sct;
-					usbs.type = MMC_EMMC;
-					usbs.partition = EMMC_GPP + 1;
-					usbs.ro = false;
-					usbs.system_maintenance = &manual_system_maintenance;
-					usbs.set_text = &usb_gadget_set_text;
-				}else{
+			error = 0;
+			if(emu_info.enabled == 4 && emu_info.sector){
+				if(!emmc_initialize(false)){
 					error = 3;
 				}
+				storage = &emmc_storage;
+			}else if(emu_info.enabled == 1 && emu_info.sector){
+				if(!sd_initialize(false)){
+					error = 4;
+				}
+				storage = &sd_storage;
+			}else if((emu_info.enabled == 1 || emu_info.enabled == 4) && !emu_info.sector){
+				if(emu_info.enabled == 1){
+					if(!sd_mount()){
+						error = 4;
+					}
+				}else{
+					if(!emmc_mount()){
+						error = 3;
+					}
+				}
+				if(error == 0){
+					file_based = true;
+					if(emu_info.enabled ==1){
+						strcpy(path, "sd:");
+					}else{
+						strcpy(path, "emmc:");
+					}
+					strcat(path, emu_info.path);
+					strcat(path, "/SD/");
+					if(!file_based_storage_init(path)){
+						error = 9;
+					}
+				}
+			}else{
+				error = 10;
 			}
 		}else{
-			error = 7;
+			error = 10;
 		}
+
+		if(error == 0 && emu_info.enabled){
+			error = 6;
+			if(file_based){
+				usbs.offset = 0;
+			}else{
+				usbs.offset = emu_info.sector;
+			}
+
+			if(file_based){
+				error = 9;
+				u32 sz = file_based_storage_get_total_size();
+				if(sz){
+					error = 0;
+				}
+				usbs.sectors = sz;
+			}else{
+				error = 3;
+				mbr_t mbr;
+				if(sdmmc_storage_read(storage, emu_info.sector, 1, &mbr)){
+					error = 0;
+					usbs.sectors = mbr.partitions[0].size_sct + mbr.partitions[0].start_sct;
+				}
+			}
+		}
+	}
+
+	if(emu_info.path){
+		free(emu_info.path);
 	}

 	if(error){
 		_create_mbox_ums_error(error);
 	}else{
+		if(file_based){
+			usbs.type = MMC_FILE_BASED;
+		}else{
+			usbs.type = emu_info.enabled == 1 ? MMC_SD : MMC_EMMC;
+		}
+		usbs.partition = EMMC_GPP + 1;
+		usbs.ro = false;
+		usbs.system_maintenance = &manual_system_maintenance;
+		usbs.set_text = &usb_gadget_set_text;
 		_create_mbox_ums(&usbs, NYX_UMS_EMUSD);
 	}

+	file_based_storage_end();
 	boot_storage_unmount();

 	return LV_RES_OK;
--- a/nyx/nyx_gui/storage/sfd.c
+++ b/nyx/nyx_gui/storage/sfd.c
@@ -1,8 +1,12 @@
 #include "sfd.h"
 #include <storage/emmc.h>
 #include <storage/sdmmc.h>
+#include <storage/file_based_storage.h>
 #include <libs/fatfs/diskio.h>
+#include <string.h>

+
+static bool file_based;
 static sdmmc_storage_t *_storage;
 static u32 _offset;
 static u32 _size;
@@ -14,7 +18,11 @@ static void ensure_partition(){
 }

 sdmmc_storage_t *sfd_get_storage(){
-	return _storage;
+	if(file_based){
+		return NULL;
+	}else{
+		return _storage;
+	}
 }

 int sfd_read(u32 sector, u32 count, void *buff){
@@ -22,8 +30,13 @@ int sfd_read(u32 sector, u32 count, void *buff){
 	if(sector + count > _size){
 		return 0;
 	}
-	ensure_partition();
-	res = sdmmc_storage_read(_storage, sector + _offset, count, buff);
+
+	if(file_based){
+		res = file_based_storage_read(sector, count, buff);
+	}else{
+		ensure_partition();
+		res = sdmmc_storage_read(_storage, sector + _offset, count, buff);
+	}
 	return res;
 }

@@ -32,8 +45,14 @@ int sfd_write(u32 sector, u32 count, void *buff){
 	if(sector + count > _size){
 		return 0;
 	}
-	ensure_partition();
-	res = sdmmc_storage_write(_storage, sector + _offset, count, buff);
+
+	if(file_based){
+		res = file_based_storage_write(sector, count, buff);
+	}else{
+		ensure_partition();
+		res = sdmmc_storage_write(_storage, sector + _offset, count, buff);
+	}
+
 	return res;
 }

@@ -45,10 +64,23 @@ bool sfd_init(sdmmc_storage_t *storage, u32 offset, u32 size){
 	return true;
 }

+bool sfd_file_based_init(const char *base_path) {
+	file_based = true;
+	if(!file_based_storage_init(base_path)){
+		gfx_printf("file based init fail\n");
+		return 0;
+	}
+	_size = file_based_storage_get_total_size();
+	disk_set_info(DRIVE_SFD, SET_SECTOR_COUNT, &_size);
+
+	return 1;
+}
+
 void sfd_end(){
 	_storage = NULL;
 	_offset = 0;
 	_size = 0;
 	u32 size = 0;
+	file_based = false;
 	disk_set_info(DRIVE_SFD, SET_SECTOR_COUNT, &size);
 }
--- a/nyx/nyx_gui/storage/sfd.h
+++ b/nyx/nyx_gui/storage/sfd.h
@@ -7,6 +7,7 @@
 int sfd_read(u32 sector, u32 count, void *buff);
 int sfd_write(u32 sector, u32 count, void *buff);

+bool sfd_file_based_init(const char *base_path);
 bool sfd_init(sdmmc_storage_t *storage, u32 offset, u32 size);
 void sfd_end();