Before MetaTana changes your files MetaTana can rename and move media files and folders and write or replace NFO, artwork and other sidecar files. With automatic settings, it does this without asking each time. Replaced files go to `.metatana-trash`, and most changes can be undone in Activity. Undo cannot restore a file that something else changed after MetaTana wrote it. Files on network shares can also be changed by other software. Keep a current backup of your media somewhere MetaTana does not change.