Hi there and welcomeThis is done via a program called content manager which you install on your computer.
What you need to do is the following
Download and install SmartGPS on your Computer
You can get it here http://www.magellangps.com/contentmanager
Turn on your GPS. Wait for the menu to appear and connect to your Computer using the USB cable provided.SmartGPS will automatically prompt you about the update. If Content Manager does not prompt you, right click on the software icon located in the system tray and select "Check for updates now". It will inform you if you have the latest software already installed.
If you have any problems, or would like any additional information or assistance, please do not hesitate to let me know.
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