I had about 35 GB of space left on my internal harddrive, then at some point I ftp-ed into my ps3 and removed a game off of the internal harddrive through the ftp client (mistake). When I restarted my ps3, it now shows 0 KB of space left, I tried deleting some demos and stuff through the xmb but it's stuck on 0 KB left.
My question is, is there a quick fix or do I have to format? and If I have to format, what will I lose? game saves, Homebrew apps, trophies?