How to auto back up from WD Passport to another external drive through my imac

WD External Drives External Drives for Mac
1

Hi guys, sort of a computer dunce here. Is it possible to set auto back up so that everything on a second external drive (made for mac)  is backed up automatically to my new WD Passport Essentials drive? If so , how do I go about this? Thank you!

2

As I’m told, if you’re using SmartWare on a Mac, you won’t even see other externals.  So, no, you can’t.