I’m Android, so not like comparing apples to apples and also use windows PC. I use USB, loaded with MP3 albums. The wife uses the cars Bluetooth media player, in which she sends music straight from her phone.
Do you have iTunes, which would be the easiest way to create USB playlists and can advice on how to ?
I vaguely remember, part of the upgrades were media related, but exactly what I don’t know.