有了它，你可以备份你的磁盘到网络、光学和可移动媒介上，或者是其他硬盘驱动器上。

With it you can back up your disk to network locations, optical and removable media, and other hard drives.

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所有主要的硬盘制造商都销售能够直接或是通过网络连接到个人电脑的外接硬盘，所带的备份程序也比较简单。

All the major hard-disk makers sell external hard disks that connect to a PC either directly, or over a network, and which come with relatively simple backup programs.

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网络硬盘为用户提供了私人的空间，可将自己的文件照片文档等上传到服务器上备份，其它用户无法查看你的文件信息。

Network hard drive to provide users with a private space, may be its own file upload photos and other files on the backup server, other users can not view your file information.

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