Updating the Software Using Garmin Express
Before you can update your device software, you must download and install the Garmin Express™ application and add your device (Syncing Your Data with Your Computer).
Connect the device to your computer using the USB cable.
When new software is available, the Garmin Express application sends it to your device.
Garmin Express application finishes sending the update, disconnect the device from your computer.
Your device installs the update.