Brand new My Passport has power but is not accessible!

Help!  My brand new My Passport detected as good by disk management, LED is on, but is not accessible in My Computer or via any software.

* LED is on

* HDD is receiving power

* Shows up as “Healthy” in Disk Management

* Device Properties shows it as good

I tried a different computer and get the same problem

I tried my other WD external hard drives with the same cable & computer and they work fine.

What could the issue be?

Change the drive letter or reformat