Re: album art sd card
When I've had problems its been because the size of the cover art was too large... Anything 500x500 and under seems to work fine. Also make sure each of the MP3's has the art embedded as frequently iTunes just flags the album with one song's art and does not embed it in every MP3.
Edit: Also as others have mentioned it is a good idea to delete any hidden files from the SD and lock it to read only before inserting into UConnect.
2016 JGC Limited 75th Aniversary 5.7L Hemi, Lux, NAV, ORA-II, Recon Green
1998 JGC-ZJ Limited 5.9L, Deep Slate, 185K+ miles
1998 JGC-ZJ Limited 5.9L, Stone White, 351K+ miles and still going