The drive is an internal Toshiba DeskTop 3TB DT01ACA300. This drive was originally in a Synology NAS, it was fine there. I upgraded the disk to a bigger one. Today I want to backup stuff to it. Now I have it connected via a SATA > USB adapter.
1. Reformatting it with the Synology
2. Windows diskmgmt.msc
3. Various computers with Windows 7, Windows 8, Windows 10
4. Windows Diskpart
create partition primary
I'm thinking the disk simply needs to be repartitioned with a utility that can see the entire hard disk. Everything I find on the internet describes using diskpart and essentially creating a GPT partition. I've tried 4 different computers with different OSs on them. I get exactly the same result everytime. I'm stumped.