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