I've been a bit concerned about having so much stuff in my computer case. I'm currently using a 20GB hard drive for Windows and everything except Poser. A 120GB hard drive has Poser, and another 30GB hard drive has my projects. Add a DVD burner, and you have lots of heat buildup. Some of my hard drives had been dying. I got a bigger case, rounded IDE cables, etc. I'm still concerned about heat. An external USB hard drive seemed to be the answer. But they do cost more.