Is my new My Passport Ultra DOA…?

Plugged it in, and it asked if I wanted to use it for Time Machine I say "yes’ and it begins to back up. After about 3 minutes, a message pops up ‘disc not correctly ejected’ and the backup quits. I’ve tried 3 times, with the same results.

Brand new, literally took delivery an hour ago. MacBook Pro Mojave 10.14.6. It’s just sitting next to my MBP on the desk.

Is it DOA…?