So my iMac was crashing and it wouldn't start up. I tried booting from a disk and all that jazz, and Disk Utility said that it couldn't repair the disk, so I erased and restored from a Time Machine backup. Before this all happened, I had around 40GB free. Now, I have 114GB free! I can't tell what's missing, so I'm not complaining, gaining 70 odd GB without trying is always a good thing, but I'm baffled as to where this much free space could have come from!! Any ideas?