Set android:allowBackup to false

example/android/app/src/main/AndroidManifest.xml

@@ -22,7 +22,7 @@
 
     <application
       android:name=".MainApplication"
-      android:allowBackup="true"
+      android:allowBackup="false"
       android:label="@string/app_name"
       android:icon="@mipmap/ic_launcher"
       android:theme="@style/AppTheme">