Although I got my Micra last October, I only just tried out the USB on a recent road trip and it doesn't work. I am taking it in (AGAIN! -- lots of little issues with this car, but not enough to put me off it) tomorrow because the service guy said that the cable sometimes "slips". So if the screen tells you there is no USB, this might be the problem. Bluetooth is only phone, unless the USB is working and it is plugged in there for music (if the USB is working).
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View my fuel log 2015 Micra SV automatic: 7.4 L/100 km ... 38.0 mpg (Imp) ... 13.4 km/L ... 31.6 mpg (US) ...