Hello all, this is my first post here so if it's in the wrong spot my apologies! Ok, I know a decent amount about computers that I wanted to upgrade my Hard Drive, I currently have a puny Western Digital WDC WD300BB-32AUA1 (WD-WMA6W1966775). I'd like to replace it but not sure if it's ATA or SATA, I believe it's a ATA as it has the wide ribbon cable. If so, what are possible upgrades? For example, I'm looking for a minimal of 80GB. Don't care about much else... Also, I no longer have my Windows CDs so when I install a new hard drive I don't feel like blowing more money on buying a new OS. How can I avoid this? Thanks a ton, all info would be great! EDIT Is it even possible to just add another hard drive??