80GB's I think you mean
Well, there are many you could buy.
Do you know what motherboard you have in your system? Usually its written on it, or there are programs we can ask you to download which would give you this information also.
I want to know by the motherboard model, what your motherboard supports as a drive, i.e, if it supports IDE, and SATA/SATA II, or just IDE, etc, so we can choose the appropiate and best drive for your needs.
Also, how big of a drive would you want? They are pretty cheap now, for even one as big as 320GB-500GB depending on what you'll use it for.