As always, keep backups of all the files you change and have at least one system backup image in case the worst happens.

永远记住要备份您所修改过的所有文件，为了防止最坏的情况发生，您还需要有至少一个系统备份的映像。

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Do you have a browser or backup utility or security scanner or version-control system that serves you well when it operates on local files?

您拥有在操作本地文件时能很好地工作的浏览器、备份实用程序、安全性扫描程序或版本控制系统吗？

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A full backup — in other words, one where you copy all of the files from your system — would obviously capture everything, but it can be an expensive way of backing up your information.

完全备份，即复制系统中所有的文件，很明显这样做可以保存所有的信息，但这可能是一种代价很大的信息备份方式。

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And you have a certain amount of redundancy in the system as well in terms of storage you can remove, a place where pictures and backup files can reside, and a way for files to be moved around without having to play around with cables or network connections.

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