Load tracks from computer to XDJ-RX

I believe you need to use an ethernet cable on the RX to load tracks from the laptop to the RX, the USB is for HID mode on Rekordbox DJ

Thanks guys I'll try the ethernet cable. 

I wonder what could be the benefit of Rekordbox mode with ethernet, or HID over USB.  I suppose HID doesn't work with RB trial mode?  I cannot test the difference since my Macbook does not have an ethernet.  I could buy an USB ethernet, but for that I first have to know if ethernet connection would be any advantage? Currently, I'm always using the XDJ-RX with USB pen.

i pretty much use all USB or turntables...but figured w/ the computer I can play files from my computer and prep them at the same time.