def save_response_content(response,
                          destination,
                          file_size=None,
                          chunk_size=32768):
    if file_size is not None:
        pbar = tqdm(total=math.ceil(file_size / chunk_size), unit='chunk')

        readable_file_size = sizeof_fmt(file_size)
    else:
        pbar = None

    with open(destination, 'wb') as f:
        downloaded_size = 0
        for chunk in response.iter_content(chunk_size):
            downloaded_size += chunk_size
            if pbar is not None:
                pbar.update(1)
                pbar.set_description(f'Download {sizeof_fmt(downloaded_size)} '
                                     f'/ {readable_file_size}')
            if chunk:  # filter out keep-alive new chunks
                f.write(chunk)
        if pbar is not None:
            pbar.close()