I am trying to update the maps on my Garmin Drive 50. When I connect it to my PC, it appears as a (completely full, zero bytes available) drive in File Explorer, but Garmin Express can't find it. I have tried with several different USB ports, both on powered hubs and on the PC itself. I have also tried with several different USB cables. Nothing has made any difference.
I found a video on Youtube that suggested I let the device battery charge fully, then try again. It has been connected to my PC for several hours but still shows the "charging" icon. Below that is the graphic of the device connected to a tower PC. The icon is in yellow/orange, and Garmin Express still shows the device as "Not Connected."
What can I try next?