Use Garmin Express to install this file. The system requirement for updating software is IBM-compatible PC running Windows XP or later operating system and an available USB port. For the Montana Garmin software changes history, please refer to here.
Noted: This software update process is done at your own risk. Before initiating the update process be sure to backup and make copies of all waypoints, routes or any important through BaseCamp. If the firmware process is interrupted your product may not function properly, therefore do not interrupt the process and ensure the unit is on a reliable power supply. Damage caused by incomplete upgrades will not be covered by warranty.