def _get_readable_size(size_in_bytes, rounding=1):
    """Max out at 1024YB (future proof! Get at me, EFS!)"""
    for unit in ['', 'K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y']:
        if abs(size_in_bytes) < 1024:
            return '{}{}{}'.format(round(size_in_bytes, rounding), unit, 'B')
        size_in_bytes /= 1024
    return None
