-(NSArray *)backupFilesListSorted:(NSString*)folderPath
{

    NSFileManager *manager = [NSFileManager defaultManager];
    NSArray *files = [manager contentsOfDirectoryAtURL:[NSURL URLWithString:folderPath]
                            includingPropertiesForKeys:[NSArray arrayWithObject:NSURLContentModificationDateKey]
                                               options:NSDirectoryEnumerationSkipsHiddenFiles
                                                 error:nil];

    NSDictionary *dictionary = [[NSMutableDictionary alloc] init];
    for(NSURL *urlfile in files) {
        NSDate *date = nil;
        if ([urlfile getResourceValue:&date forKey:NSURLContentModificationDateKey error:nil]) {
            [dictionary setValue:urlfile forKey:[date description]];
        }
    }
    NSLog(@"dic: %@", dictionary);

    NSArray *sortArray = [dictionary allValues];
    NSLog(@"file: %@", sortArray);

    return sortArray;
}