First of all, you should consider connecting your Garmin device directly to your computer system using The USB cable. For Garmin Update, you will also need to install the ‘Garmin Express’ as per your operating system. Moreover, you should click on the ‘Add a Device’ option and then locate the GPS. After that, you should click on the ‘Select All’ option to update all. Once done successfully, you should disconnect the device and start using your Garmin device. In case of any mishaps or inconvenience, you should take help from the Garmin experts at any time.