Dear Garmin,
You have Garmin Express to synchro music on your watch.
That is not working since the first release, you know that.
You can try synchronize using Windows Media Player, uploading usually works, however deleting playlists don't work.
Removing manually using windows explorer from fenix folder neither.
Why need customers to fire similar kind of messages?
Isn't it time to replace your current developer(s)?? and that those bugs are fixed soonest and for ever.
I paid a lot of money extra to have music and playlists properly stored on my watch.
After 1 year experience, I can't recommend Garmin Fenix 6 x pro, music features are a pain in the ass and bugs are not solved.
Regards,
Paul.