Garmin 510 lost data I rode the Georgia 3 gap bike ride yesterday.  For me almost a lifetime accomplishment.  I used a Garmin 510 and when it reached 22% I plugged in an external charger.  The screen continued to indicate my ride.  However, when I finished and hit Save  there was no data preserved.  Is there any way to retrieve this data?

Thanks, Dave Holmes
I have seen similar happen with my Garmin 500, regardless of duration/distance of the ride. For me, it occured when I had the Garmin plugged in to my Mac. I would delete activities from the Garmin and then safely remove (will also happen if you unsafely remove) the device. How to avoid this on Mac operating systems:


Delete your activities on Garmin
Empty trash via finder menu
Safely remove your Garmin device


I haven't tested if similar occurs on Windows or Linux.