Ok so i hadnt backed up my macbook pro in over a month and i backed it up yesterday and it backed up 158gig. Ok i thought because it hasnt backed up in a long time lot has changed. Well i go today to do a routine backup and it wants to do another 148 gig backup! I havnt even changed anything besides my wireless password! Any help on this? Its starting to annoy me because ive never had this issue before.