I have a 250gig Western Digital Hd. I`m attempting to also hook up an 80 gig Western Digital Hd. The 80gig belongs to my daughter who`s pc messed up. I`m attempting to load all her stuff onto my pc if I can get it to recognize her hd. I`ve even disconnected my 250 gig and plugged hers in the identical way mine was, it still won`t recognize it. I went into the bios and there the 80 gig is bigger than daylight, but it won`t boot up. This hd is good and was working fine on her pc until it crashed (motherboard is dead). I`ve tried every combonation according to the manuals, etc. I`ve tried all the master and slave combos available. I know this subject may be kind of vague in description, but that`s it in a nutshell. Anything I might be missing? 