According to Time Machine I have 52 GB included for my backup which sounds right since "Get Info" on Macintosh HD shows 52GB used. So I created a a 125GB partition on my external HD just for use by Time Machine. Well, Time Machine used that 125GB in just a couple days or so without me doing anything other than some general web surfing. I wouldn't have thought it would have used up that much space that fast. What am I missing???? So how much space should I have allocated for Time Machine usage? Any advice or thoughts are much appreciated.