For Brazil you can download CN South America [Only registered and activated users can see links. ] the file gmapprom.rar after unzipping copy in folder Map or Garmin into your nuvi or ,if you want to put the map in sd you need to create a folder named garmin inside you have to put the map name gmapprom becomes gmapsupp,before this you formating sd in FAT32 slow formatting . The difference between lock and unlock are .when locked nuvi does not read the map, when unlocked nuvi reads map.The gmapprom is unlocked.
The first times you for downloaded the maps you can to click 10 likes in the forum,after you open the download.Done



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