Everytime I go back to this piece of hardware there's trouble with syncing.
I only manage to sync via up-to-date-garmin express to about 1/10th, then the watch shuts down for some reason, although it was perfectly transferring, slowly but steadily. Now I looked at how many past activities I had stored and it's around 20 of them. The oldest dated to 2nd Nov, then 18 dated on yesterday with 2 minute intervals (those were real runs from september, apparently the date got changed for some reason, at least I don't remember running 8 km in 2 minutes multiple times yesterday) and the most recent activity is from today.
Never seen a more frustrating piece of hardware.
I'll delete all activities so sync works again, past requests for help didn't work here (or ended up with 'reset your device', looking at you random shutdown at 40% battery-issue which came back again btw), so you can close this thread again, just needed to vent.
The hardware is great, but your software guys annoy the heck out of me.
Have a nice day.
edit: Sync worked after I deleted all dubios activities on the watch.