@Coeta
You must use BaseCamp or MapSource to transfer the map data in whole or part as you require. Use an sd as catymag informed you in Post #2. You said you've already got the gmap folder installed in C:\ProgramData\Garmin\Maps so it will show in either program. Most people find MS a bit easier to use than BC. Maybe do some more reading from [Only registered and activated users can see links. ], particularly the ones on 'Mapsource and other programs'.