Files are deleted but space is not freed

[Aravisian]

@DrGodofredo

I am considering doing a fresh install, so I searched and discovered that Timeshift could save me some of the trouble of installing and configuring everything again, but it wouldn't work, as Timeshift gives me the same read of my disk and so would only bring the problem to my new install.

You can try this method:

[HOW TO] Easily reinstall programs when Reinstalling Zorin

Sometimes, bad things happen even to good people. Maybe it was a power outage or some spilled coffee... But whatever it was, you now must wipe and reinstall Zorin OS. What makes this particularly daunting is all your software you have installed must now be reinstalled. (EDIT: I am removing the script option as some report they work and some report they do not work. Y-PPA-Manager is a lot easier and works every time.) You can use Y PPA Manager GUI tool to back up your current repositories. Ru…

The filling of the disk most likely is a Temporary Files folder in conjunction with Flatpak.