Apologies if this has been answered before but I have an Arcade that I bought a few months ago and I think it's time to get a hard drive so I can download some DLCs. Fallout 3's Broken Steel is mainly what I am interested in right now but I might download a couple more DLCs for other games in the future. However, I'm kind of strapped for cash at the moment and seeing how I can get a 20GB hard drive for less than $30 on eBay, I was wondering whether that's good enough for what I want to use it for. With that said, I would appreciate it if someone can let me know much space a typical DLC takes up so that I have some idea of how much content I can fit on a 20GB drive. Many thanks in advance.