Hi Vic, well, I had my points loaded in Humviewer then I exported them to my desktop Pc. I then loaded them in HumPC and exported them to my SD card. The problem I was having was when I put the SD card into the unit and powered it up, it wouldn't load my waypoints. I finally found out you have to input your SD card after the unit is already powered up and then it will prompt you to load the waypoints. I had all my waypoints in the .gpx format.