First run Garmin Express or Webupdater to update firmware and files.
Code:
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Code:
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Enable hidden files in Windows to see .System in pc.
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I don't know wich files have you got, but all the infos, depending on what you have downloaded are here
[Only registered and activated users can see links. ]
Scroll and find the one you need: gmap, img etc. You can send the needed map to device with BaseCamp&Mapinstall or put the img directly in Nuvi.