Cdj 2000 nxs2 won't read usb

I have a scandisk extreme 256 gb 3.2 usb drive. it is format fat32. when i load it up on my rx3 it reads and everything works fine. but when i plug it in cdj 2000 nxs 2 (i think newest firmware) it wont read, i have tried 5 diffrent cdjs. what am i missing ? 

And just a thought why does rekordbox not have a feature that format the usb to the right format ?