I have a Dell Optiplex GX620 desktop computer, and I wanted to add a second hard drive in my computer. The hard drive is a SATA 100/133 80GB WD Model ST380013AS. I was going to install a new WD160 GB 7200RMP hard drive. Trouble is, there are several different type of models to choose from, but don’t know for sure which one is more compatibly with my present hard drive. Any suggestion which hard drive I should add to my computer? The second hard drive will be use as a slave drive, and I already know how to set the jumper for that. Thanks!

KRR