@Barteld-Hartstra said:
Thank you very much for your answer. For the first time, a clear explanation of what happens to your routes when you use Tread, including the storage in the cloud. And more importantly: a solution that I can use.
You're welcome.
There is another use here who documented his nightmare with Tread/Explore, and how he corrected his situation. It can be viewed in post #11:
https://forum.myrouteapp.com/topic/11124/gpx-versions-1.1-vs-1.2-for-garmin-visually-explained?page=1
It's clear that Garmin is deemphasizing external GPX route imports in favor of doing all route creation directly on their GPS navigation devices. They've officially cut out transfers from Basecamp to XT2/XT3 devices. And it's also clear there is a glitchy hit/miss problem transferring with Tread/Explore. If they ever change their Garmin/GPX file structure to eliminate allowing wired GPX file copies, that will be it for me. I think they're smart enough to not completely block outside transfers moving forward, but who knows?