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
Pioneer cdj 2000 nxs2 - ShowMax Event Services
USB CONNECTOR TYPE A SOCKET PIONEER CDJ-2000 DKN1553 (USB-A IN PCB DWX3043) | eBay
Rent Pioneer XDJ XZ Players and Mixer unit Usb CDJ 2000 NEXUS in Romford (rent for £150.00 / day, £78.57 / week)
CDJ 2000 900 REAR TYPE B USB SOCKET FOR PIONEER CDJ2000 CDJ900 (DKN1574) 5060548760953 | eBay