Question 1TB HDD showing up in windows explorer twice

[Nixeoo]

I connected a brand new wd 1tb hdd and it shows up in disk management and windows explorer as 2 drives both a part of disk 2. One is 441 GB and one is 488GB.

https://imgur.com/a/bHXg4Gt

https://imgur.com/a/S1IO3Cm

 

[USAFRet]

That's not brand new out of the box like that.
Was this drive connected when you installed the OS on the 120GB C drive?