My Passport Ultra is not recognizable in WD Access

Downloaded WD Access to attempt to update My Passport Ultra. It last backed up on Jan 30, 2017. I have upgraded my OS to 10.12.5. Mac now attempts, but runs for hours and will not complete a backup.

Hi,

What’s the name of the backup software you are using to back up your Mac?

And note the WD Access software was designed for the My Cloud series not the My Passport Ultra models.