Step 4Copy the map to the GPS
The map is a file called GMAPSUPP.IMG and it lives in the \Garmin folder. You can ignore any other files that may be present.
So the order of ceremony is something like this:
1: Copy the existing GMAPSUPP, your old map, to your PC so you don't lose it. Stick it in a folder with a sensible name!
2: Delete the GMAPSUPP on the SD card / mounted GPS.
3: Copy your new map IMG up to the card/GPS's \Garmin folder.
4: If it's not called GMAPSUPP.IMG, rename it now.
Finally, restart your GPS and your map will be ready for adventure!
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