My 1TB hard drive showing up as only 800GB

So a while back when I first setup my hard drive I made it 800GB instead of the full 1TB (it's a 1 TB hard drive) for some reason thinking I could extend it later.

I couldn't extend it when I tried so I made a backup of all my files onto another drive and deleted all the partitions on the problem drive. This is what it shows:

http://ift.tt/2qAQvIL

I am 100% sure that this IS a 1TB drive because it says 1TB on it, I bought it brand new (It's a Western Digital Caviar Blue), and I vaguely remember being able to choose 1TB when I was first setting it up.

Please help!

Submitted May 30, 2017 at 07:42AM by Blastguy http://ift.tt/2r69L4p