You know what else would be good for this ?  The ability to view by who uploaded them, and the ability to view by dates / times uploaded.  AS an example, if a users files were maliciously encrypted, and they did not realize it and uploaded a bulk of files, you could easily say, delete only the files uploaded on these 2 days, everything else prior is OK.
Even the potential or option to keep 1 or 2 versions prior ? almost like versioning ? 

Likewise, if a user uploaded a bunch of files and then later realized the files were corroupted, but the originals were ok, they could roll them back, deleting the newest ones and keeping the previous version.