hELLO, sorry to disturb you, but i have bought a nuvi 3760T with Nort America Maps, the question is that i don't have any idea if i need to do something before copy this file to my device, could you indicate any thread to help me if necessary, sorry to disturb but i was a user of TOMTOM in the past, and this is my first Garmin. thanks in advance for your feedback.