Any of you guys give the drive a clean up to get rid of things that you start and stop on Mac, so if it's doing stuff that doesn't finish, does it create wasted clusters on the hard drive taking up space, like Windows did. I've had it 5 months now and want to tidy up and clean it, I heard you can clean up stuff in Disk Utility, is that the way to go? Does that clean up web history too over and above the delete history, as well as cleaning up the hard drive to get more space back? Is it true that what something like Clean My Mac does, which I've been advised by you guys to steer well clear of, can basically be done in Disk Utility? Am I half right in assuming 'Erase Free Space' is what I'm maybe after for cleaning documents, web etc, and is it safe to do? While we're on the subject, Can someone explain what the difference is in the left column of disk utility. between the Macintosh HD capacity 319, and the 320.07 HD above it, I thought it was the same thing, but clicking one gives different options to the other, what's that all about?