Thanks for the replies. I was actually uploading the waypoints to my sd, but the unit was not responding, not uploading the waypoints. In another post I saw that others have had an issue with this in the past. Starting the unit up, with the sd card already in, doesn't always work. I just needed to power up the unit first, then put the card in. When I did this, it worked perfectly. New waypoints are in unit and ready to go. Now if the weather would just get a little better, I could try them out on the lake.