Hallo. I was doing day three of the Sani2C mountain bike challenge 86km in the cane fields and valleys. There was not any arrowing done and had to rely only on my Garmin Edge 830. Halfway through my race the unit started doing firmware updates and lost all riding data as well as navigation. What do i need to to to avoid this from ever hapening again. must ony update when connected to Garmin Connect?