Title, I installed my system with two partitions, a big one and a small one for the OS. I figured 100GB would be enough for the OS one, but apparently not as it keeps filling up. Steam keeps filling it for some reason, something to do with Proton. I know that messing with partition sizes has a risk of data loss and all that, and I don’t really want to lose parts of my OS.
consider switching to btrfs which has subvolumes (think partitions as folders, no need to predefine their size) and you’ll never have to deal with this again. also compression and deduping (all those duplicate games dlls and whatnot take up space only once)