Hi all. Using Yosemite Preview 3. I'm looking at available disc space on my main (internal) hard drive. ForkLift says 377Gb free, Finder says 412Gb free. But I think Finder is lying because I tried to do a Time Machine backup to a 100Gb external drive and it wouldn't run because it needed 120Gb to do the backup (my MBP drive is 500Gb). Anyone have any ideas? I've done a Verify partition from within Disk Utility and it came back clean, no issues found.