After searching the entirety of the internet I have come here to try to resolve my problem. I have a Seagate barracuda 1.5tb 3.5" 7200rpm hard drive which i was previously using to run windows server 2008. I am now trying to use it as an external hard drive for my laptop, however the laptop does not seem to recognize it. I tried using two different cases, three different usb ports, and i confirmed that everything was properly plugged in and powered on. The hard drive does not appear in disk manager, my computer, or the BIOS. Any help would be greatly appreciated.