private void backup(File storagePath) {
   if (!storagePath.isDirectory()) {
     storagePath.mkdir();
   }
   // ModelAccess.getInstace(cb.getContext()).applyDelayedTriggerUpdates();
   SQLiteDatabase db = new CpuTunerOpenHelper(cb.getContext()).getWritableDatabase();
   ExportConfig config = new ExportConfig(db, DB.DATABASE_NAME, storagePath, ExportType.JSON);
   config.setExcludeTable(DB.SwitchLogDB.TABLE_NAME);
   ExportDataTask exportDataTask = new ExportDataTask(cb);
   exportDataTask.execute(new ExportConfig[] {config});
 }