Get WD Passport external drive to work

My Passport will no longer start the back0up when I plug it into my desktop PC. It did complete a back-up as as recently as July 1, 2017.
What to do?

Thanks, Paul

Hi paul.metzler2010 ,

Have you tried to uninstall and install the backup software?

I will try that.

(The Rev.) Paul A. Metzler, D.Min. St. Louis, Missouri
(314) 942-9085 (home)
(315) 415-4731 (cell)