@austin-1 I TOO HAVE THE ZUMO XT2, I WORK FROM A MAC PRO DESK TOP.
I HAVE HAD SUCCESS ONCE I DISCOVERED THE ' ANDROID FILE TRANSFER APP'
I CONNECT MY ZUMO XT2 DIRECT WITH A USB-C CABLE TO MY LAP TOP, THEN GIVE ' ANDROID FILE TRANSFER ' APP UP TO ONE OR TWO MINUTES TO RECOGNIZE THE ZUMO.
A SEPARATE WINDOW WILL OPEN SHOWING THE FILES ON THE ZUMO.
DEPENDING ON WHERE YOU ' SAVE ' YOUR FILES FROM MRA YOU WILL NEED TO OPEN A SEPARATE WINDOW AND THEN DRAG THE NEW FILE INTO THE GPX FOLDER .. IT WILL LOAD IMMEDIATELY.
NEXT DISCONNECT AND RE-START YOUR ZUMO, THE ZUMO WILL TELL YOU THERE ARE ' NEW ' FILES TO DOWNLOAD.
THIS NEXT PART IS SOMETHING MAYBE ONLY I AM STRUGGLING WITH AS A PAST ' BASECAMP ' UDER.
I AM CURRENTLY STARTING THE ROUTES I TRANSFER WITH ' ALL ' VIA POINTS ... NO ' SHAPING POINTS '.
THEN ON THE ZUMO I CHANGE THE POINTS TO ' SHAPING AS NEEDED. THIS IS BECAUSE THE SHAPING POINTS SEEM TO NOT CLEAR AUTOMATICALLY IF A VARY OFF ROUTE AND ALSO I BELIEVE I MUST NOT UNDERSTAND SOMETHING ABOUT ' IGNORING ' THEM.