diff --git a/cmds/sm/src/com/android/commands/sm/Sm.java b/cmds/sm/src/com/android/commands/sm/Sm.java
index f5bee6c0c724..260c8a47ea3c 100644
--- a/cmds/sm/src/com/android/commands/sm/Sm.java
+++ b/cmds/sm/src/com/android/commands/sm/Sm.java
@@ -258,7 +258,7 @@ public final class Sm {
 
     public void runDisableAppDataIsolation() throws RemoteException {
         if (!SystemProperties.getBoolean(
-                ANDROID_VOLD_APP_DATA_ISOLATION_ENABLED_PROPERTY, true)) {
+                ANDROID_VOLD_APP_DATA_ISOLATION_ENABLED_PROPERTY, false)) {
             throw new IllegalStateException("Storage app data isolation is not enabled.");
         }
         final String pkgName = nextArg();
diff --git a/core/jni/com_android_internal_os_Zygote.cpp b/core/jni/com_android_internal_os_Zygote.cpp
index fee82bac489c..8b7096646cff 100644
--- a/core/jni/com_android_internal_os_Zygote.cpp
+++ b/core/jni/com_android_internal_os_Zygote.cpp
@@ -825,7 +825,7 @@ static void MountEmulatedStorage(uid_t uid, jint mount_mode,
   PrepareDir(user_source, 0710, user_id ? AID_ROOT : AID_SHELL,
              multiuser_get_uid(user_id, AID_EVERYBODY), fail_fn);
 
-  bool isAppDataIsolationEnabled = GetBoolProperty(kVoldAppDataIsolation, true);
+  bool isAppDataIsolationEnabled = GetBoolProperty(kVoldAppDataIsolation, false);
 
   if (mount_mode == MOUNT_EXTERNAL_PASS_THROUGH) {
       const std::string pass_through_source = StringPrintf("/mnt/pass_through/%d", user_id);
diff --git a/services/core/java/com/android/server/StorageManagerService.java b/services/core/java/com/android/server/StorageManagerService.java
index a1a4418b8d17..0c785da5c242 100644
--- a/services/core/java/com/android/server/StorageManagerService.java
+++ b/services/core/java/com/android/server/StorageManagerService.java
@@ -1850,7 +1850,7 @@ class StorageManagerService extends IStorageManager.Stub
     public StorageManagerService(Context context) {
         sSelf = this;
         mVoldAppDataIsolationEnabled = SystemProperties.getBoolean(
-                ANDROID_VOLD_APP_DATA_ISOLATION_ENABLED_PROPERTY, true);
+                ANDROID_VOLD_APP_DATA_ISOLATION_ENABLED_PROPERTY, false);
         mContext = context;
         mResolver = mContext.getContentResolver();
         mCallbacks = new Callbacks(FgThread.get().getLooper());
diff --git a/services/core/java/com/android/server/am/ProcessList.java b/services/core/java/com/android/server/am/ProcessList.java
index 2a39326d6b92..5a9c4dea4703 100644
--- a/services/core/java/com/android/server/am/ProcessList.java
+++ b/services/core/java/com/android/server/am/ProcessList.java
@@ -792,7 +792,7 @@ public final class ProcessList {
         mAppDataIsolationEnabled =
                 SystemProperties.getBoolean(ANDROID_APP_DATA_ISOLATION_ENABLED_PROPERTY, true);
         mVoldAppDataIsolationEnabled = SystemProperties.getBoolean(
-                ANDROID_VOLD_APP_DATA_ISOLATION_ENABLED_PROPERTY, true);
+                ANDROID_VOLD_APP_DATA_ISOLATION_ENABLED_PROPERTY, false);
         mAppDataIsolationAllowlistedApps = new ArrayList<>(
                 SystemConfig.getInstance().getAppDataIsolationWhitelistedApps());