Greetings,
I have a very old Garmin (Kenwood DNX 8120 from 2008). I've been able to keep it updated for 15 years by using MapInstall to copy just 3-4 tiles from each new unlocked City Navigator North America map. These few region maps cover much more than the areas I drive in. I then copy the small gmapsupp.img to the Kenwood using the rear USB cable plugged into a Windows laptop (another benefit of the ...