My 3TB hard drive has 1TB unallocated

I know it’s been nearly a year since this post, but I would like to thank you! I had the same issue while I was checking some portable hard drives I’m giving away. Apparently, this hard drive has had this problem all along, and nobody in my company reported it to me. I followed your advice and suddenly have another TB of disk space! I’ve decided to keep this disk for my own use. Thanks again!