是不是公事包用完了30 MB便不能使用

用完了 30 MB 只會停止你 不可以再 上載資料，除非你 忘了密碼，否則是可以正常進入 公事包 的。

No.
If you delete some file in it, it will have space again.
Just like GeoCities, when you delete some file, it will have more space.
If you used 30MB, it will not let you to put more files in it only.