Accidentally Deleted D: Drive

I was trying to use my D: Drive to store some data because it was 900+ GB free and my C drive was already full

So I decided to try to listen to the guy in this post and it has now deleted my D Drive???

I got to step 7 and clicked yes and now my 919 GB D Drive is gone? Thanks Dell

en.community.dell.com/.../19467205

EDIT: SOLVED

I must have blind because there was a box at the bottom that was "unallocated" that I didn't see. I set it up as a simple drive and voila, I can now put files on it. I would delete the post but I didn't see how to. Sorry!