I dont seem to have lockscreen widgets on my phone or I would used MM for the swiping. Im using a samsung a10e. I dont see anywhere to attach sorry. Here is my imgur link which might work?

https://imgur.com/a/FgDPDsl

It is set to MTP. I also uninstalled MM phone app as im trying to get it to work with my swipe app for driving. Attached some screen shots in case you see anything off.
https://imgur.com/a/CJPAgVC

my phone is a samsung galaxy a10e updated to android 10.

I tried changing the phone Sync Profile and not just the card to PLA (and pls) and I still cannot get anything but m3u playlists. Not sure if thats what you meant by device playlist preference. I also made it the only format in Set Formats under sync profile.

Also I wanted to try and use PLA playlist format as it may be more compatable with another player. I set up in sync profile to use PLA and it still uses m3u

Just sending the playlist from MM used to work. I set up sync and it does the same thing. I installed MM phone app and gave it permission to my SD card but it transfers all my music to the phone but then says its 'inaccessible". So every time I sync it wants to retransfer all my music. No idea ...

Ive tried multiple players and am using latest MM. I put a playlist on the phone microsd card and the music is in the right folders but wont play with a phone app. I can though play the music directly from the folder when I browse there with windows. Ive downloaded the playlist from the phone and it...