Linux Mint Forums

If you have been looking at large images it might be that .thumbnails is building up. You could check this at two ways:
1. Use Disk Usage Analyzer and check what folder(s) is the culprit.
2. Involves using the terminal, but I prefer this way, because then you could focus on the hidden folders in /home/user/ (which is generally the culprits when the HDD is loosing space): Here is an example of what mine gives:

596 /home/magnus/.gstreamer-0.10
632 /home/magnus/.themes/Moomex-Ultimatum
656 /home/magnus/.thumbnails/normal
660 /home/magnus/.thumbnails
756 /home/magnus/.themes/BlackBoard
772 /home/magnus/.themes/Truth+
824 /home/magnus/.themes/SlicknesS(golden)
3840 /home/magnus/.themes
4876 /home/magnus/.cache/tracker
4880 /home/magnus/.cache
36692 /home/magnus/.mozilla/firefox
36696 /home/magnus/.mozilla

I see that .mozilla and .cache is the largest folders, so I would go about and clean them out Even though 36696 bytes is only roughly 34 MB, I can clean out my temp files in Firefox, and then be on my way..
EDIT:
You could look here and at this

I was looking through my /var/cache as well, it measured 300 MB, I thought this was temporary files which could be deleted at reboot.. It seems like apt is a big sinner for me, but I am bit scared of deleting that, breaking apt is pretty hard to undo..

Sorry, I am unaware of such. You might have to make a script you can run, but I could not help you with that even if you held a gun to my head...