Play back 2 back with 2 usb

Hello guys Ops this can be solved quick

I’m trying to play back to back with 2 Usb but it seems it’s not working

When I insert the second usb I click on the eject button and the screen shows me the 2 Usb , with the one as Source , but I can’t switch one to the other . I need to stop the set and let the other performer play

Any useful tip on it

Thanks guys appreciate it

Press and hold menu and select the drive you like to have active.

(Shift+Eject is a shortcut to the same menu)

Denon DJ PRIME 4 Tutorial

I’ll try and update you

Thanks djeric