Behringer UFX 1604 mixer shows “nac” when trying to record to usb

If your Behringer UFX mixer shows “nac” when inserting a usb you need to move the switch in the back to the middle position “Stand alone” mode. If the mixer is in usb or firewire mode the standalone mixer will not function. Once in stand alone the message “FSE” (or maybe “FOR”) means the drive …