My laptop's 80GB HD is pretty much full. I was thinking of buying an external (200+ GB) HD. I looked at some, but they were too expensive. I know that you can buy some kind of case and then buy a cheaper internal HD and make it work by connecting it via USB cable.
Question is: What exactly do I need to buy to make this work? I don't care about the looks, all I want is cheap storage for my files, movies, etc.