I was using that app that iDefrag has to back up your bootable disc, so you can boot off a new one or whatever, and it kind of hung when the progress bar finished, twice. Both times I cancelled it. But now I'm missing 6 or so gigs that I can't seem to find. Is there any way I can actually find what is taking up this space? I'd quite like it back, considering my hard drive doesn't have all that much space left.