The file which is used by the user is no longer the share file under the centralized storage, but a copy sheet. Whatever the user does any revision even damaged in the local, the file under the centralized storage will not change at all. 用户使用的不再是集中存储共享的那个文件,而是其本机的一个副本文件,无论本地对该文件作任何的修改,甚至是破坏,都不会影响到集中存储的文件安全。