Solved 2 TB Hard Drive in Enclosure not recognized

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I'm not sure if I should post this in here or in the CompTIA forum.

I purchased a USB 3.0 Hard Drive enclosure to make backups easier instead of copying over the network to a NAS. I pulled the Seagate 2TB drive from the NAS and installed it in the enclosure. I then walked downstairs, connected the drive to the Windows 7 64-bit computer, and turned the drive on. It definitely spins up, but does not appear in the My Computer window as a drive. I can see it in the Drive Management window though.

It worked earlier with a small 80 GB drive. Windows 7 32-bit gave it a drive letter and I was able to copy without problem.

Should I be doing something different in Drive Management to get this to work? I have several hundred gigs of data already on the drive, and do not want to lose that.

http://i68.tinypic.com/53a3he.jpg

Thank you!

@Bedrock1977,

If the drive is accessible, you should be able to assign the partition a drive letter by right clicking on that partition. If your NAS drive was apart of an array, you may not have access to all the data. If you can assign it a drive letter it will show up in My Computer.

The drive was the only drive in the NAS.

All options to assign a drive letter are grayed-out. The only options I can choose are delete the volume or convert to a dynamic disk.

@Bedrock1977,

Ok. I did a little more research to try and find a non destructive way to try something. Even so, I recommend you try to back up your data before trying the method I found here :

http://woshub.com/windows-doesnt-assign-letters-to-external-and-usb-flash-drives/

This involves restarting a service that may have stopped and using diskpart to mount the drive.

I backed up as suggested and then followed the directions found in the link you provided. It worked just fine!!

Thank you for your assistance and sorry for taking so long to respond.