That's strange indeed, that for disk 3 it only shows 2 GB and no unallocated space.
Boot into a Linux disc or stick (free to make) and tell what GPARTED says about it.
I decided to install a new HDD and clean install Windows 10 onto my pc. The problem i'm currently having is that the system is only recognizing 1/1000th of the disk. I've tried re-partitioning, PGD formatting, hard drive bios updates, and checking if the drive itself is functioning properly, but yet still no luck. How can I get Windows to recognize the full 2TB on my new HDD? When I boot into the bios, the system seems to know that theirs 2TB of storage.
Thanks in advance.