按照规划您的升级上面的步骤，来创建所有数据以及配置信息的备份版本。
To create a backup version of all of your data and any configuration information, follow the steps for Planning your upgrade.
不过呢，备份版本库才是好的方式，这样你就可以连同项目的历史都能恢复出来。
It is, however, a good idea to back up the repository, so that you will be able to restore the history of the project.
如果你没有损坏文档的可读备份版本，需马上复制一份损坏文档的备份到可移动介质上。
If you don't have a backup copy of the corrupt document readily available, make a copy of the corrupted file right away and store it on removable media.
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