I have just finished building my new computer and everything is working perfectly, OS updated, all drivers updated, SSD boots up OS perfectly, but I cannot find my WD Green mechanical drive to start saving new programs such as Steam and whatnot. The BIOS sees it in the boot options but nowhere else. Also, disk management does not pick it up. Am I missing drivers? Is it faulty? I have checked all the cables, and like I said, the BIOS does recognize it... sort of. It shows in the Boot Menu, not in the Boot Priority.