WD Passport Help - Not backing up right!

WD External Drives WD Portable Drives
4

For some reason it is still not working.  I search through My Passport for new items that I’ve placed on my Desktop and for some reason they are not being backed up.  Do you know if there is a special set up for this?  I want the Passport to find all new items no matter where it is and add it to the backup.

Thank you very much for your help!