def METHOD_NAME(destination_blob_name, num_of_files,
                                            file_size_unit, file_size,
                                            filename_prefix,
                                            local_destination_folder,
                                            upload_to_gcs_bucket):
  for batch_start in range(1, num_of_files + 1, BATCH_SIZE):
    for file_num in range(batch_start, batch_start + BATCH_SIZE):
      if file_num > num_of_files:
        break
      file_name = '{}_{}'.format(filename_prefix, file_num)
      temp_file = '{}/{}.txt'.format(TEMPORARY_DIRECTORY, file_name)
      # Creating files in temporary folder:
      with open(temp_file, 'wb') as out:
        if(file_size_unit.lower() == 'gb'):
          out.truncate(1024 * 1024 * 1024 * int(file_size))
        if(file_size_unit.lower() == 'mb'):
          out.truncate(1024 * 1024 * int(file_size))
        if(file_size_unit.lower() == 'kb'):
          out.truncate(1024 * int(file_size))
        if(file_size_unit.lower() == 'b'):
          out.truncate(int(file_size))
    num_files = os.listdir(TEMPORARY_DIRECTORY)
    if not num_files:
      return 0
    # Uploading batch files to GCS
    if upload_to_gcs_bucket:
      process = Popen(
          'gsutil -m cp -r {}/* {}'.format(TEMPORARY_DIRECTORY,
                                          destination_blob_name),
          shell=True)
      process.communicate()
      exit_code = process.wait()
      if exit_code != 0:
        return exit_code
    # Copying batch files from temporary to local destination folder:
    subprocess.call(
        'cp -r {}/* {}'.format(TEMPORARY_DIRECTORY, local_destination_folder),
        shell=True)
    # Deleting batch files from temporary folder:
    subprocess.call('rm -rf {}/*'.format(TEMPORARY_DIRECTORY), shell=True)
    # Writing number of files uploaded to output file after every batch uploads:
    logmessage('{}/{} files uploaded to {}\n'.format(file_num, num_of_files,
                                                     destination_blob_name))
  return 0