: Use a compatible USB cable to connect the Garmin unit directly to your computer.
If your device version is compatible with newer Garmin standards, try the Garmin Express download : Update in Garmin Express is Stuck on 'Preparing' garmin 10r-04 6953 software update
If you rely on your Garmin for marine navigation, backcountry exploration, or daily driving, the update is practically mandatory. The improvements in GPS lock speed, battery life, and bug fixes far outweigh the minor risks. : Use a compatible USB cable to connect