Right on, thanks! It's telling me insufficient capacity, which seems strange considering I have no files on it at the moment. Maybe there really is just some kind of issue with the drive that HW Info wasn't able to pick up?
Try the Reset-PhysicalDisk command I edited in to my post. There's most likely some metadata sitting at the front of the disk that needs to be wiped and that doesn't happen when you delete partitions.
If that doesn't work then go in to diskpart, select the disk, Clean command it, exit diskpart run the Reset-PhysicalDisk again and it should change to CanPool True.