I had these issues in GM vehicles last couple of years - only 4 specific albums on my "test drive" USB stick would work - I never solved that one. Tried multiple formats on multiple drives, always the same 4 albums
But as @Slow_lane discovered, vehicles evolve and so did I. Having two new cars in the driveway and a fresh 3rd one every other week, I updated my "test drive" thumb drive because many vehicles, including my own CX-90, only have USB-C nowadays. But, many still have the old USB-A fitting. So I got this:
Not as small as the mega-mini sticks, but pretty small and very flexible. Works in everyting so far. Including a GM
Edit: bought two on amazon, on sale for $15 - one for the Mrs that stays in the Mazda's center armrest cubby, and a loaded one for me full of stuff she can't tolerate