One thing that is true about me is the fact I never delete files. OK I delete applications I’ve downloaded from the Internet once the versions I’ve obtained are outdated, and maybe a few other little files here and there. But in general I do delete files and that’s because storage is cheap.
I just picked up another 2TB 7200RPM hard drive for about $129.00. With space at that price level there really is no reason not to keep everything you’ve ever created, purchased, or downloaded.