So I needed to transfer a large amount of data from my old computer to my new one. So I put all that data on a Hitachi 1TB SATA drive and set about putting that HDD in my new computer. BIOS sees it no problem. Windows sees the drive in both system properties and computer manager. But is unable to initialize the drive. What should I do? I've plugged it the computer via a SATA USB adapter but no dice. I can't format it because I'll lose the data. Any other ideas? Should I just bring it a computer repair place?
If it wants to "initialize" the drive then your volume description may be corrupt.
What does Disk Manager show for this drive? If it shows a valid partition, we go one way. If it shows that the drive is raw, we try something like EASEUS Partition Recovery, Recuva, or any of a bagful of utilities that are out there.
(BTW, bumping a half-hour later is kind of pointless. It's a forum; the people who know the answers may not log in and notice your message until after dinner, or even getting back from vacation.)