The Garmin QUEST in a type of GPS from GARMIN
Questions related to 'routes' and the Garmin QUEST
Can I download a track (route) from RouteYou on my Garmin QUEST
The Quest can NOT upload a track in a simple way, but there is a workaround.
The Quest can store a max of 10000 points as a "tracklog" as internal memory.
The workaround: The way to get the track on a Quest is to get that track directly in the tracklog memory.
You can do this to rename the track ACTIVE LOG and put it in the directory on your machine where you find the file with teh same name.
After you have done this, it is possible to display the track on your device;