def METHOD_NAME(bytes_):
    if abs(bytes_) < 1000:
        return str(bytes_) + "B"
    elif abs(bytes_) < 1e6:
        return str(round(bytes_ / 1e3, 2)) + "kB"
    elif abs(bytes_) < 1e9:
        return str(round(bytes_ / 1e6, 2)) + "MB"
    else:
        return str(round(bytes_ / 1e9, 2)) + "GB"