Just been to an open decks night and the CDJs didn't recognise my USB. Formatted in FAT32, synced via Rekordbox and sucessfully used a few weeks ago. I even re-formatted the drive
Numark PT01USB Portable Vinyl-Archiving USB turntable – Fleet Pro Sound
Pioneer's new CD deck and mixer feature MIDI integration, USB for external storage | Engadget
Amazon.com: 8K USB C HDMI Hub, Steam Deck Dock, USB C Adapter with 8K@30Hz, 4K@120Hz/60Hz/30Hz Ultra HDR Display, PD 100W, USB 3.0 * 2 for Steam Deck, MacBook Pro, Laptop with Thunderbolt4/3,
PINEBOOK Pro USB-C Docking Deck - PINE STORE
Best USB-C Hubs for Steam Deck With and Without Power Delivery - IGN