If you need to update Garmin uconnect maps then for that the user needs one USB drive, 8GB or higher then on your vehicles uconnect screen then select “Navigation” then click “settings” then click “system “ and then click “about” then visit the Garmin. Com then select firmware updates then gets the USB drives inserted in your computer then get the USB drive into vehicle USB port. If still there is any issue that needs a resolution then for that connects with the Garmin Helpline Number & http://www.garmincustomerservice.co.uk/