I had successfully transferred music to my Fenix 6 Pro using Garmin Express on Windows 10. When I reconnected the watch to my PC and used Garmin Express to try to add more music to the watch, Garmin Express stayed for over an hour at "Checking ..." from the capacity graph at the bottom of the screen before I cancelled it out and would not see any of the existing files on the watch nor allow me to add any new ones. I've tried updating Garmin Express to the latest version, running Garmin Express as an admin, refreshing the library from within Garmin Express, and restarting the watch and computer. The music is visible on the watch and plays from the watch and the files are visible from Windows Explorer when I connect the watch to the PC. So it appears to be an issue with Garmin Express, which is why I am posting the question here. Does anyone have any suggestions for troubleshooting or fixing the issue so that I can manage the music on my watch?