Following the post 'How to prepare your navigation plan', you want now to export the created waypoints and routes on some usb memory stick.
To export the file, just click on the 'Save the gpx file' button at the bottom right corner of the map :
Then click on the 'export' in the window which appears on the screen :
and confirm your save :
Then go the the Downloads folder of your PC or Mac to locate the file :
and if necessary, save it in a usb memory stick