I suddenly have 0 bytes of hard drive space free, and deleting anything won't free anything up. My Fallout 4 and ONLY folder takes up 0.98 TB apparently for some reason all of the sudden. How do I fix this? This is a huge problem. I'm guessing one and possibly the only option would to be get rid of Fallout 4.

EDIT: I just noticed there's nothing in my FO4 folder that could add up to 0.98 TB.

Could be a messed up sector or corrupted MFT. What folder specifically is that big? Could be memory dumps, in which case it's safe to trash.

Deleting my Fallout 4 installation fixed the problem. I'm still confused why this happened.

Maybe reset the computer. Or buy a new HDD. Assuming it isn't an SSD they aren't over the top on price

Edit: Saw your fix

what drive did you have?