EDIT - I SOLVED THE PROBLEM LOL

i had a timeshift snapshot that was like 500GB because i had been including /home in my backups. fixed.

So, my system has been complaining that my main OS drive is almost completely full. However, I just deleted like 250GB of games off it to fix the problem. It’s a 2TB SSD.

output of df says i only have 52GB free:

Dolphin file manager agrees. However, using Filelight, and my own reckoning, I can only account for 660GB of space used up.

even doing du -sh */ from / only seems to show about 1TB of space used on the disk. Where is my other ~800GB of space?