def uploadThread_small(srcfile, prefix_and_key):
    print(f'\033[0;32;1m--->Uploading\033[0m {srcfile["Key"]} - small file')
    with open(os.path.join(SrcDir, srcfile["Key"]), 'rb') as data:
        for retryTime in range(MaxRetry + 1):
            try:
                pstart_time = time.time()
                chunkdata = data.read()
                chunkdata_md5 = hashlib.md5(chunkdata)
                s3_dest_client.put_object(
                    Body=chunkdata,
                    Bucket=DesBucket,
                    Key=prefix_and_key,
                    ContentMD5=base64.b64encode(chunkdata_md5.digest()).decode('utf-8'),
                    StorageClass=StorageClass
                )
                pload_time = time.time() - pstart_time
                pload_bytes = len(chunkdata)
                pload_speed = size_to_str(int(pload_bytes / pload_time)) + "/s"
                print(f'\033[0;34;1m    --->Complete\033[0m {srcfile["Key"]} - small file - {pload_speed}')
                break
            except Exception as e:
                logger.warning(f'Upload small file Fail: {srcfile["Key"]}, '
                               f'{str(e)}, Attempts: {retryTime}')
                if retryTime >= MaxRetry:
                    logger.error(f'Fail MaxRetry Download/Upload small file: {srcfile["Key"]}')
                    return "MaxRetry"
                else:
                    time.sleep(5 * retryTime)
    return