New GPS. New SD card. The GPS doesn't know the card is there. Garmin Express can't find it. The computer sees it. Basecamp sees it but as an external drive. See below. It should come up like this. I formatted the card according to Garmin's instructions. I can drop GPX files on it but neither Basecamp nor the GPS access them. When I save waypoints or routes, it saves to both the GPS and the SD. What am I doing wrong?