Computer will not read hard drives installed from another.

[Eurocoffee]

Hi Everyone.

My rig has been giving me problems so I have been using my backup machine. Both run 7 x64 with very similar hardware so I could use one to troubleshoot the other. Q8800, Gigabyte GA-p43-ES3G, 8gb@2.1v, HD7950.

I'm attempting to install a WD Red 3tb drive that is known good and loaded with files. It installs fine and is readable in Device Manager but is not active or initialized?

When I right click on it I only get the option to Format, Change drive letter or path, or Convert to Dynamic Disk.
There is data on it that I want to access. How can I activate it without corrupting my files?

Thanks in advance.

 

[Eurocoffee]

Problem Solved. Once I assigned a drive letter to the drive it becomes active.