private IRecord getMergedRecord() {
   List<IRecord> mergableRecords = mBackupManager.getMergableRecords();
   if (Util.isCollectionEmpty(mergableRecords)) {
     return null;
   }
   final String preferSdCardPath = Util.getSdRootPathOnPreference(this);
   for (IRecord record : mergableRecords) {
     String recordDir = ((RestorableRecord) record).getRecordRootDir();
     if (recordDir.startsWith(preferSdCardPath)) {
       return record;
     }
   }
   return mergableRecords.get(0);
 }