Thank you, CFboy.
To be safe especially since so many crazy, unaexplainable Edge 800 complaints, I'll use your approach to only load onto an SD card......just need to buy some cards. Is bigger better? I think they come in 4 to 32GB. Hope to use it on a 300k that is coming up, I need to hussle to figure this thing out. Battery should last long enough.
I assume there are websites where riders share they ride files that I can load?