When we rename a file or folder, the parent folder is being modified. 当我们重命名一个目录里面的文件，父目录也都被修改了。
On volumes formatted for such a file system, a new directory inherits the compression and encryption attributes of its parent directory. 以卷格式化的文件系统，一个新的目录将继承它父目录的压缩和加密特性。
