说明：  在的局域网中，文件服务器中的共享磁盘空间经常被用户传上来的共享文件撑满。为了节省这些宝贵的共享磁盘资源，不让服务器中的共享文件夹无限制地占用磁盘空间
(At the local area network, file server disk space shared by users often Chuan hold up over the sharing of documents. In order to save these valuable resources shared disk from a server shared folder in the occupation of unlimited disk space)