498 GB bazzite partition full of cache?

As the title says, my Bazzite partition is full. Judging by some other posts similar to this, it might be full of cache, but I’m stupid and I don’t know the lingo and whatnot. I saw something about “drilling down,” but I have no clue what that means, so I’m hoping someone can walk me through this.

There’s a few apps like Filelight which can tell you which folders take the most space.