private static long getDatabaseBackupTime(final Folder backupDir) {
        final ContentStorage.FileInformation restoreFile = getDatabaseFile(backupDir);
        if (restoreFile == null) {
            return NO_ACCESSIBLE_FILE;
        }
        return restoreFile.lastModified;
    }
Private methods containing the real backup process
main/src/main/java/cgeo/geocaching/utils/BackupUtils.java