Currently i have one 1TB HDD for my Asus M32BF model desktop. I want another 1TB HDD. I'm confused if i have the right cables or not. I have two cables that look like they would be for an HDD they are just hanging, not pluged in. I guess one is for the power supply and the other is for the sata. My question is, do i have to buy a certain HDD that will be compatiable with my computer, and can you lead me in the right direction, like ebay. I saw some on there that are pretty cheap for a 1tb hdd. Please and thank you.