New 3TB HDD showing as 2 drives

[spcycwgrl]

I've just built my first system. I have three internal hard drives; I used a 250GB SSD for my C: drive. I added a 1TB drive that I liberated from an old Dell system [E:] just because it seemed a waste to toss a good HDD. I also purchased a new 3TB HDD drive. Initially it was only showing as 18GB [D:], and that had an empty file "recovery" in it the rest of the disk was unformatted. I formatted the rest of the disk and now it's showing as it's own drive [H:]. I'd like to combine D: and H: so that it's all one drive but I'm at a loss how to do it. The initial part of the #TB drive that was formatted was Fat32. I've formatted the 18GB to NTSB as well as the remainder of the drive but they're showing separate and I can't figure out how to remove the partition and combine them. I don't mind a partitioned drive but an 18GB partition is silly.

Thanks in advance.
Sammye

Here's the diskmgmt.msc screen http://imgur.com/r1pWeh5

Intel Core i5-4690 3.5GHz Quad-Core Processor
Asus Z97-PRO ATX LGA1150 Motherboard
G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory
Samsung 850 EVO-Series 250GB 2.5" Solid State Drive
Toshiba 3TB 3.5" 7200RPM Internal Hard Drive
WD caviar black 3.5" 1 TB internal HDD
Sapphire Radeon R7 260X 2GB Video Card
Fractal Design Define R4 Blackout with Window ATX Mid Tower Case
Corsair CX 600W 80+ Bronze Certified Semi-Modular ATX Power Supply

 

[spooky2th]

In disk manager, delete both or all partitions on the drive then create a new partition of all the drive space, then a quick format. can also download the free partition Wizard to manipulate the partitions too.