This problem has happened to me several times, once for a race! I save my run data on my watch and then click done. Then my Garmin will suddenly power off by itself. There is plenty of battery charge so it is not that. Then when I go to synch my data on my Mac, it is gone. When I look at my history on the watch there is no history. It is erasing everything or really not saving it as it states it is after i push the save then done button. This is really frustrating. I have tried resetting the watch but this does not seem to help.
Any ideas how to correct this?
Thanks, Pat