Hi my friend.
It's the second time I've a .fit file in my Enduro damages.
This kind of file blocks the watch synch to Garmin Connect both via Android App and Garmin Express (USB). I tried uploading to Garmin Connect website too but nothing!
The http://garmin.kiesewetter.nl/ tool no longer works.
The strange thing is that STRAVA can read the corrupted .fit file and it's the only solution I found:
1 - upload to Strava
2 - export from Strava as gpx
3 - import to Garmin Connect website (losing a lot of info)
Someone has a different solutions?
Is it a bug of Enduro during saving?