The documentation says :" USB Mode Sets the device to use mass storage mode or Garmin[SUP]®[/SUP] mode when connected to a computer. "
but what does it mean in clear ? what is the difference ?
Thanks
So the only reason to use Garmin Mode is if you need to charge during an activity with something that looks like a PC.
So the only reason to use Garmin Mode is if you need to charge during an activity with something that looks like a PC.
To be fair, "Garmin Mode" probably actually refers to Garmin's old USB protocol, which would still work with older desktop software like Basecamp, but not Garmin Express. Older Garmin devices did not support mass storage mode at all. The mass storage prompt is probably there because in 99% of cases, you actually want mass storage mode.
I tried it once (using Garmin Mode, connecting to a PC and answering "No" to "Use Mass Storage") and Basecamp recognized my watch although it said that certain things could not be transferred (waypoints, routes and tracks).
So it might be more of a legacy option so you can use it with old software. After all, your watch still shows up Windows' device manager when you answer "no" to "Use Mass Storage?" and Basecamp still detects it (although it's not clear to me if it can actually do anything with the 935 in that mode).
But the practical consequence is when you answer "no" to "Use Mass Storage?", your watch is still usable while plugging it into a PC (although the file system is not accessible). This is probably more of a side effect as opposed to the actual purpose of the feature, which would be to allow people to use Garmin USB mode on a PC if they need it.
Anyway, I still think there's no almost no reason for most users to use "Garmin Mode", unless maybe you're cycling with Zwift on a laptop and you suddenly need to charge your watch....
FWIW: I leave my watch in Garmin mode, becaues during my Ultra marathons I use a USB charger while running, and garmin mode is needed to keep the activity running while charging
If I remember correctly GARMIN mode is meant to use the GPS data in real time in computer mapping software.
It’s from the time back to the Pilots units had no background Maps.
You’d take a notebook and your GPS (sometimes via RS 232 adapter) with a software like GPSTrackmaker to use in the Field.
GPS that time had also external antenas connectors.
Regards