Hi, I have an XP pc, Gigabyte GA-K8NS Ultra-939 AMD Socket 939 motherboard. The current IDE hard disks are full. I have fitted two WD 500g SATA disks. The USB port sees them as USB devices and suggests that they can be uninstalled. I can't find them anywhere on Computer. I would like to either use them for storage or as the main HD. Any suggestions?