Thread: Update old Garmin Nuvi 3790T

Thanks Neil, I did start reading the suggested threads but it's really confusing when you're not familiar with any of the procedures and terrified of breaking the thing at every step. I think my real worry (and probably every newbie's worry) is that what you'll wind up with will be actually less than what you have now!
Still, I will keep reading and keep trying - I'm fed up with driving over fields a roundabouts that have suddenly appeared!

Is there some sort of 'backup everything' you can do so that if things go wrong, you can just restore everything as it was and start again?