How can I export a playlist from Music to an SD card?

Before Music I used iTunes, and I expected there to be similarities. But I have a playlist in Music and I want to export it to a SD Card (like I used to do in iTunes). There is no menu to do this. I resorted to dragging the files from the playlist as just dragging the playlist wouldn't work. Only 2 of my 167 songs transferred. So i resorted to copy and paste which did worked - all 167 present, but when I put the SD card into my car infotainment system the card does not show up. Can anyone suggest a resolution please? I've tried changing the format of the card twice but that makes no difference.

Thanks

[Re-Titled by Moderator]