diff --git a/manager/app/src/main/java/com/rifsxd/ksunext/ui/screen/BackupRestore.kt b/manager/app/src/main/java/com/rifsxd/ksunext/ui/screen/BackupRestore.kt
index 9633939f..f487204b 100644
--- a/manager/app/src/main/java/com/rifsxd/ksunext/ui/screen/BackupRestore.kt
+++ b/manager/app/src/main/java/com/rifsxd/ksunext/ui/screen/BackupRestore.kt
@@ -165,9 +165,7 @@ fun BackupRestoreScreen(navigator: DestinationsNavigator) {
             val prefs = context.getSharedPreferences("settings", Context.MODE_PRIVATE)
 
             var useOverlayFs by rememberSaveable {
-                mutableStateOf(
-                    prefs.getBoolean("use_overlay_fs", false)
-                )
+                mutableStateOf(readMountSystemFile())
             }
 
             val moduleRestore = stringResource(id = R.string.module_restore)
diff --git a/manager/app/src/main/java/com/rifsxd/ksunext/ui/screen/Settings.kt b/manager/app/src/main/java/com/rifsxd/ksunext/ui/screen/Settings.kt
index e186583a..44d63d53 100644
--- a/manager/app/src/main/java/com/rifsxd/ksunext/ui/screen/Settings.kt
+++ b/manager/app/src/main/java/com/rifsxd/ksunext/ui/screen/Settings.kt
@@ -224,9 +224,11 @@ fun SettingScreen(navigator: DestinationsNavigator) {
             }
 
             var useOverlayFs by rememberSaveable {
-                mutableStateOf(
-                    prefs.getBoolean("use_overlay_fs", false)
-                )
+                mutableStateOf(readMountSystemFile())
+            }
+
+            LaunchedEffect(Unit) {
+                useOverlayFs = readMountSystemFile()
             }
 
             var showRebootDialog by remember { mutableStateOf(false) }
@@ -244,8 +246,10 @@ fun SettingScreen(navigator: DestinationsNavigator) {
                     useOverlayFs = it
                     if (useOverlayFs) {
                         moduleBackup()
+                        updateMountSystemFile(true)
                     } else {
                         moduleMigration()
+                        updateMountSystemFile(false)
                     }
                     if (isManager) install()
                     showRebootDialog = true
diff --git a/manager/app/src/main/java/com/rifsxd/ksunext/ui/util/KsuCli.kt b/manager/app/src/main/java/com/rifsxd/ksunext/ui/util/KsuCli.kt
index d9dd7117..3771eb33 100644
--- a/manager/app/src/main/java/com/rifsxd/ksunext/ui/util/KsuCli.kt
+++ b/manager/app/src/main/java/com/rifsxd/ksunext/ui/util/KsuCli.kt
@@ -37,10 +37,16 @@ private fun ksuDaemonOverlayfsPath(): String {
     return ksuApp.applicationInfo.nativeLibraryDir + File.separator + "libksud_overlayfs.so"
 }
 
+fun readMountSystemFile(): Boolean {
+    val shell = getRootShell()
+    val filePath = "/data/adb/ksu/mount_system"
+    val result = ShellUtils.fastCmd(shell, "cat $filePath").trim()
+    return result == "OVERLAYFS"
+}
+
 // Get the path based on the user's choice
 fun getKsuDaemonPath(): String {
-    val prefs = ksuApp.getSharedPreferences("settings", Context.MODE_PRIVATE)
-    val useOverlayFs = prefs.getBoolean("use_overlay_fs", false)
+    val useOverlayFs = readMountSystemFile()
     
     return if (useOverlayFs) {
         ksuDaemonOverlayfsPath()
@@ -49,6 +55,16 @@ fun getKsuDaemonPath(): String {
     }
 }
 
+fun updateMountSystemFile(useOverlayFs: Boolean) {
+    val shell = getRootShell()
+    val filePath = "/data/adb/ksu/mount_system"
+    if (useOverlayFs) {
+        ShellUtils.fastCmd(shell, "echo -n OVERLAYFS > $filePath")
+    } else {
+        ShellUtils.fastCmd(shell, "echo -n MAGIC_MOUNT > $filePath")
+    }
+}
+
 data class FlashResult(val code: Int, val err: String, val showReboot: Boolean) {
     constructor(result: Shell.Result, showReboot: Boolean) : this(result.code, result.err.joinToString("\n"), showReboot)
     constructor(result: Shell.Result) : this(result, result.isSuccess)