In 1Ms featuring CIC (Car Infotainment Computer) the glovebox features a USB port too, to be distinguished from the USB port under the armrest between the front seats:
- USB port inside the glovebox: SATNAV map updates, sound import to HDD and route/itinerary import;
- USB port under the armrest between the front seats: direct sound playback only.
Inside my car:
Location (picture of a US spec 135i glovebox, but same location on a 1M):