diff --git a/source/backup.c b/source/backup.c
index c53a1b2..438768e 100644
--- a/source/backup.c
+++ b/source/backup.c
@@ -24,17 +24,9 @@ int backup_user_data(void) {
         return res;
     }
     
-    // Backup DBI if it exists
-    if (path_exists("sd:/switch/DBI")) {
-        res = folder_copy("sd:/switch/DBI", TEMP_BACKUP_PATH);
-        if (res != FR_OK) {
-            return res;
-        }
-    }
-    
-    // Backup Tinfoil if it exists
-    if (path_exists("sd:/switch/tinfoil")) {
-        res = folder_copy("sd:/switch/tinfoil", TEMP_BACKUP_PATH);
+    // Backup DBI settings file only (not .nro installers)
+    if (path_exists(DBI_CONFIG_PATH)) {
+        res = file_copy(DBI_CONFIG_PATH, TEMP_BACKUP_DBI_CONFIG);
         if (res != FR_OK) {
             return res;
         }
@@ -61,25 +53,15 @@ int restore_user_data(void) {
         return res;
     }
     
-    // Restore DBI if backup exists
-    if (path_exists("sd:/temp_backup/DBI")) {
-        res = folder_copy("sd:/temp_backup/DBI", "sd:/switch");
-        if (res == FR_OK) {
-            // Delete old DBI .nro files
-            f_unlink("sd:/switch/DBI/DBI_810_EN.nro");
-            f_unlink("sd:/switch/DBI/DBI_810_DE.nro");
-            f_unlink("sd:/switch/DBI/DBI_845_EN.nro");
-            f_unlink("sd:/switch/DBI/DBI_845_DE.nro");
-            f_unlink("sd:/switch/DBI/DBI.nro");
+    // Restore DBI settings if backed up
+    if (path_exists(TEMP_BACKUP_DBI_CONFIG)) {
+        res = f_mkdir("sd:/switch/DBI");
+        if (res != FR_OK && res != FR_EXIST) {
+            return res;
         }
-    }
-    
-    // Restore Tinfoil if backup exists
-    if (path_exists("sd:/temp_backup/tinfoil")) {
-        res = folder_copy("sd:/temp_backup/tinfoil", "sd:/switch");
-        if (res == FR_OK) {
-            // Delete old tinfoil.nro
-            f_unlink("sd:/switch/tinfoil/tinfoil.nro");
+        res = file_copy(TEMP_BACKUP_DBI_CONFIG, DBI_CONFIG_PATH);
+        if (res != FR_OK) {
+            return res;
         }
     }
     
diff --git a/source/backup.h b/source/backup.h
index c8ec35a..fe7113a 100644
--- a/source/backup.h
+++ b/source/backup.h
@@ -7,6 +7,9 @@
 #include <utils/types.h>
 
 #define TEMP_BACKUP_PATH "sd:/temp_backup"
+/** DBI settings; preserved across clean install (not whole DBI folder). */
+#define DBI_CONFIG_PATH "sd:/switch/DBI/dbi.config"
+#define TEMP_BACKUP_DBI_CONFIG TEMP_BACKUP_PATH "/dbi.config"
 
 /** Live HorizonOC settings (Overclock tool). */
 #define HORIZON_OC_CONFIG_PATH "sd:/config/horizon-oc/config.ini"
@@ -14,7 +17,7 @@
 #define HORIZON_OC_UPDATE_BACKUP_DIR "sd:/.omninx_oc_update"
 #define HORIZON_OC_UPDATE_BACKUP_INI HORIZON_OC_UPDATE_BACKUP_DIR "/config.ini"
 
-// Backup user data (DBI, Tinfoil, prod.keys) before clean install
+// Backup user data (DBI dbi.config, prod.keys) before clean install
 int backup_user_data(void);
 
 // Restore user data after clean install
diff --git a/source/deletion_lists_clean.h b/source/deletion_lists_clean.h
index d279047..70db1d8 100644
--- a/source/deletion_lists_clean.h
+++ b/source/deletion_lists_clean.h
@@ -2,8 +2,7 @@
  * OmniNX Installer - Deletion Lists for Clean Install Mode
  * Deletion policy aligned with NiklasCFW pack clean install (TegraExplorer script):
  * full sd:/atmosphere, bootloader/config subsets, sd:/switch, root + misc, then
- * post-restore paths (e.g. tinfoil db). Backup/restore of DBI, Tinfoil, prod.keys
- * is implemented in backup.c, not here.
+ * post-restore paths (e.g. tinfoil db). DBI/prod.keys backup is in backup.c.
  */
 
 #pragma once
@@ -114,7 +113,7 @@ static const char* clean_misc_files_to_delete[] = {
     NULL
 };
 
-// After DBI/Tinfoil/prod.keys restore (NiklasCFW: deldir("sd:/switch/tinfoil/db"))
+// After DBI/prod.keys restore (NiklasCFW: deldir("sd:/switch/tinfoil/db"))
 static const char* clean_post_restore_dirs_to_delete[] = {
     "sd:/switch/tinfoil/db",
     NULL
diff --git a/source/install_clean.c b/source/install_clean.c
index 7d9a60e..30341ce 100644
--- a/source/install_clean.c
+++ b/source/install_clean.c
@@ -34,7 +34,7 @@
 // Clean mode: Backup user data
 int clean_mode_backup(void) {
     set_color(COLOR_CYAN);
-    gfx_printf("  Sichere: DBI, Tinfoil, prod.keys\n");
+    gfx_printf("  Sichere: DBI (dbi.config), prod.keys\n");
     set_color(COLOR_WHITE);
     int res = backup_user_data();
     if (res == FR_OK) {
@@ -95,7 +95,7 @@ int clean_mode_wipe(void) {
 // Clean mode: Restore user data
 int clean_mode_restore(void) {
     set_color(COLOR_CYAN);
-    gfx_printf("  Stelle wieder her: DBI, Tinfoil, prod.keys\n");
+    gfx_printf("  Stelle wieder her: DBI (dbi.config), prod.keys\n");
     set_color(COLOR_WHITE);
     int res = restore_user_data();
     if (res == FR_OK) {