Offizieller Kommentar
Here's the steps:
- format your USB drive to FAT32 or HFS+ with MBR (Master Boot Record)
- download the latest firmware for your player (be sure to get the right one to match your model): CDJ-2000, CDJ-2000NXS, CDJ-2000NXS
- please DO NOT use Safari to download the firmware; it has a feature to automatically unzip the download and for some reason, it winds up corrupting the firmware data file
- unzip the download, place the UPD file onto the root of the USB drive
- hold the USB + RELOOP/EXIT button while powering-up the CDJ
- when instructed to insert the USB drive, connect it to the top USB port
- wait until the device is recognized and the firmware update has completed before powering-off the CDJ