Old.7z [TESTED]

Because ".7z" files can be password-protected, they are sometimes used by (like the Qlocker attack on QNAP NAS ) to encrypt and hide a user's data.

If the file won't open, it may be a "broken" archive from a failed backup process. You can try the 7-Zip recovery guide if the data is critical. old.7z

In technical environments, developers often name archives "old.7z" when they are retiring specific code modules or assets. Because "