Thread:Project:Support desk/How do I efficiently manage unused images?/reply

There's no effective way to get on what page a image was used that now is no longer used. A simple approach, assuming the image was uploaded to put it on a page, is to see who uploaded it, and see his/her contributions at that time to see what pages edited, and maybe find in a diff where the image was added.

About your second point, I don't know what are you referring to when you say "making changes in the file system", but files are deleted using the standard UI of deleting a page, and that doesn't generate corruption. You can also recover deleted files (unless specifically configured otherwise)