Files can be lost if the system suddenly crashes.

要是计算机系统突然崩溃，文件就可能丢失。

《牛津词典》

During maintenance activities (like Fix Pack updating), these files will be over written and the previous Settings would be lost.

在维护活动(如Fix Pack更新)期间，这些文件将被覆盖，之前的设置将丢失。

youdao

One author said he had lost track of the data when he moved offices and the files appeared to have been discarded.

这时候，奇怪的事情发生了，第一作者说，他以前搬过办公室，所以这些原始数据好像丢失了，不见了。

youdao

If you're using Windows, the most obvious solution to finding lost files would seem to be by using its built-in search features.

CNN: How do I retrieve a lost file?

Most of the policyholders whose earnings were skimmed (before new, tighter regulations on smoothing came in) have perished or got lost in the place where old files go to die.

ECONOMIST: With-profits funds

The Marine Corps has since restored all lost files from backups.

CNN: ExploreZip stings Marine Corps HQ - October 23, 19999