Ok so my question is this one, I have a Mac Book Pro 2.4 Ghz and 160 GB HD. I'ved been trying to clean my Mac erasing stuff i dont need and just placing everything on my external HD to keep my space up in my mac. So the thing is I have noticed that i keep erasing stuff but space keeps going down, then I noticed that everytime I opened something or did anything on the mac the space on HD goes down with every move. Even when I open documents or just pop open Garageband or Itunes, with every move the space goes down. I am sorry but I am a bit new at this ived had this Mac for about 4 months now and i am still learning... Is there any way I can get that space back? I thought it was the "cache" but I honestly don't know. Please can any one be so kind to explain why this happends and how can I get my HD space back!!! \ Thanks in advance!!! ^_^ !!