Interesting how they've changed the specs on thumb drives over the years and what is recognized. On my 2021 Touring I can't go any larger than 8GB in capacity and not beyond 500 songs. The system just won't show anything beyond 500 even if they are on the drive.
Playing music from USB (assuming you aren't using garbage mp3's) also sounds way better than the free streaming services. Tidal sounds good, but I'm not paying for a subscription service to listen to music I already own.