删除备份文件，标记写操作成功完成，返回。
Writing was successful, delete the backup file if there is one.
而且要能够对过去仓库处理活动的任何历史加以恢复；备份文件应该包含从档案表中删除的数据。
And also that any past history of the warehouse processing activity can be recovered; backup files should contain the data that has been deleted from the archive table.
它可以扫描他们为病毒并删除受感染的项目很容易，以及备份文件，并删除隐藏的。
It can scan them for viruses and remove infected items easily, as well as backup files and remove hidden ones.
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