Offizieller Kommentar
The USB chipset on all Pioneer products are USB2.0, and I'll tell you why...
The maximum bandwidth of USB2.0 is 40MB/s, and even if you were to link to other players and stream four 24bit / 96kHz songs from one USB2.0 device simultaneously, it's still only consuming 18MB/s (4608kb/s x 4), which is blow half of the maximum throughput.
The benefit of using a USB3.0 device is the ability to export from rekordbox at high speed.
I'll actually be doing a comprehensive USB drive review next week while at the NAMM show. Look for that to be posted to the Help Centre soon.