Hi! It's about 15days that my 910xt doesn't transfer anymore data using Garmin Express (I have a Mac)
I have also changed the ANT stick but that was not the problem.
While doing the synch I can see in the details of Garmin Express that the device is trasferring an activity dated on 31 Dec 1989 .... and it stays uploading that for ages till the device disconects itself...
What can I do? Please help!!