6TB harddrive shows two 2TB unallotted partitions

I am adding a new 6TB “WD Black” Western Digital drive. It shows two 2 TB unallotted partitions.

I have re-initialized both the partitions to GPT. It should have done the trick but it did not in my case. Restarted my computer but still I can’t get past the two 2 TB unallotted partitions. I want to claim all the 6 TB space on the hard drive as well as use it as a single drive.