Adding what I know here... saw this in the "similar threads" for the USB media album art thread:
USB Music - cover art
USB media in the Tesla is still very primitive except for what it's able to play - it can play 24bit/96KHz FLACs, amazingly enough - but its library features are so bad that you'd expect more functionality in 2001, not 2021.
It only listens to the Artist, Album, TrackNumber, Genre, and Title fields. Everything else, including AlbumArtist and AlbumArt fields, are currently ignored. AlbumArt used to work (see thread above) but was broken with an update.
File names aren't given any attention at all, unless you browse by Folder view on the screen. All files in one folder, perfectly fine, it'll still sort by artist/album.
Albums are grouped by what album matches the same Artist name first, Album name second. So if an album has some tracks saying the artist is "Feat." someone, it'll put that track alone in a different album with the same album name. It's kind of a mess that way.
I use Tag&Rename - a pretty old piece of software I've used for ... probably well over a decade now, on and off - to structure my file tags. For compilations, I'd make the Artist and Album name all the same, and put the song's actual "Artist - Title" right into the Title field. To get there, I'd write the filenames that way first, then "tag from filename" into the Title field.
Generally, for Bandcamp, I just unzip the FLAC .zip directly onto the drive into a folder for the album, and be done with it. No tag or name tweaking needed.
Oh, and as for formatting! You can use exFAT now as well (for dashcam and music) after a recent update, and dual partitioning is awesome. The dashcam partition just needs a folder called "TeslaCam" (it might be case sensitive - it's not normally all caps but it could work...?), and it'll use that partition for cam. I've been perfectly fine with a 32gb dashcam partition for a couple years now.