Garmin Edge 705: infinite loop of 'saving data'.
 

When I plug my garmin into the computer, it normally goes into 'save data' mode... giving me a status bar of 0 to 100.

Except that now, at some point, it goes back to zero, and repeats infinitely, or at least for twelve hours straight.

Any thoughts that might help?

kerbumpity.

I'd reboot the 705, then sync.

try a soft boot first (mode and lap at the same time).