Micro sd card not showing up when put into the gps. Micro sd card show's no data used & no data storded on card? New GPS & New garmin GB Discoverer national parks
Have you got GB Discoverer on the card? The map should appear on the Map Information list in the Setup > Map area. Double check the placement of the map card. Also, in case you have not found it yet, there's wealth of information on the Oregon Wiki here: garminoregon.wikispaces.com
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