<grumbles something unintelligable>
Well, I'm glad that you feel that you've been helped. Honestly, either my answer or Taw's was... a bit more complete. When you go look at HD's and realize that to buy one, you should know what all of the scary acronyms
actually mean, otherwise you risk buying something that plain won't work, and at the very least, you may end up with something that's not really right for you. Simple answers don't necessarily help much, guy- computers are more complicated than most things you'll ever mess with, besides an automobile. And there are a lot of choices out there- and they're meaningful choices. I didn't really get into any depth at all... so if you felt like that was over your head... you should probably go read up on what HDs are, and how to hook one up before you try buying one... it's
sometimes as simple as just unscrewing the old one from a case and putting the new one in... but at least half the time it's a little more complicated, because you'll have to set your jumpers correctly. Thank goodness with SATA that part is no longer necessary
If you buy a SATA drive and don't have SATA connectors on your motherboard/expansion card, then you cannot use it, period- SATA and EIDE are two very different technologies. It'd be like plugging your toaster into a light socket- it doesn't work, and it was made that way on purpose, to prevent idiots from screwing things up on accident.
So I have a feeling that later... you'll understand why our answers were a bit more... detailed. But hey, you feel empowered and un-confused right now, good luck
Just don't ask for random advice if you're not prepared for real answers...