Using this card is very simple - when the vehicle is powered off, insert the SD card into the card slot and turn on the vehicle.You now have a fully updated and enabled Navigation system on your Mazda!You will be able to update the card free for the next 3 years for any future maps updates by downloading the Mazda Toolbox application to a desktop computer and inserting the SD card.You will be sent full instructions when you purchase.Note that the SD card can only be used with one vehicle - they are not made to be swappable between vehicles. Your vehicle will lock your VIN to the SD card after driving 63 miles, and it cannot be used with another car after that