I have a MacBook with 160GB drive and I recently noticed that I only have 1.4GB left. Now, I know that 42.92GB can be attributed to my iTunes content. Also, I am currently downloading some TV Shows and Movies which are about 8GB. So I only used about 51GB yet my Finder is telling me I only have 1.4GB left. Can anyone explain why I have so little space and/or how to clean it up?