Partitioning a harddrive error

I am not sure this is the right place to past this but… 

I purchased a WD 3.0TB indernal harddrive to be used in an external drive port. I have several other 3TB disks that I have had no problems installing with no problems. However, this last one I cannot install correctly. Windows 7 has automatically partition it into an @2TB and an @750GB one. It will let my make a simple partition of the 2TB one but it will not let me use the 750GB one at all! 

Any ideas?

Hi JimH54, welcome to the WD Community. Be sure to initialize the hard drive using GPT so the full capacity can be recognized, check the link below for more information. 

http://support.microsoft.com/kb/2581408