So I guess buying a used 20GB along with DMC4 and HSG5 is a bad idea.... Wait till MGS4 and FFXIII come out and take 10GB each....... yea
I love hard drives for demos and stuff, but at least limit maximum disk usage per game, as that would prevent horrible problems like this.
I mean, if max ussage was 1GB (including save files), you could buy ~15 and still have space left over for customization and demos.