download the compressed gmasupp.img to your pc. unzip the file and transfer this to the sd card of your garmin device. make sure to back up the original one.
need help guys. i'm using nuvi 255 and currently use the free map from roadguide. i already downloaded the osm map and save it in the external SD card. how will i switch my map from roadguide to osm map? do i need mapsource to do the swtich or pwede na straight from the nuvi 255? thanks.
^ straight from nuvi ... iirc, its on settings/map/info, you would see check marks on enabled maps, uncheck/check the map you want to disable/enable
thanks po. will try this later.
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