Make sure your SD card is inserted into your GPS chartplotter and press PAGES
Tap Files
Tap Waypoints, Routes, and Trails database
Tap Export...
From Export Waypoints, Routes, and Trails set File formats to GPX (GPS Exchange)
Tap Export
Select Memory card and tap OK
Assign a name and tap Enter
The file is now created. To go to the main page tap Close
Plug the MSD/SD card out of your GPS chartplotter and plug it in your computer. If you want to know how to upload sonar logs from a Navionics Card, click here