Finding good free software is not always easy. Also, finding out where all my hard drive space has gone and deleting stuff is a royal pain in the arse. I just found this free application that is as good as any commercial, pie charting, disk management utility I've used before (which is admittedly, not a ton). Anyways, here's the application, hopefully it helps you out, kudos to the developer for making it free. Disktective