I’d kill the update download , disconnect bar in from pc, fire up express, connect garmin to pc and start upload update process again.. 13 hours nothing is happening..
Somet8mes the process gets hung and it w9nt update the unit right.. after a few minutes when you start update process you should see some time remaining prompts on the express update process and these will slowly change.
Longest it’s ever taken me for an update is about two hours. And that’s on a slow DSL