A free PC-tool called Naviextras Toolbox is available on the Downloads page. Once you connect your navigation device to your PC and launch this tool, it will automatically scan your device for installed software and maps. Alternatively Naviextras Toolbox also might recognize SD cards that were removed from the navigation device and put into a card reader.
Naviextras Toolbox is a Windows utility designed to connect your navigation device or GPS-capable PDA with your PC. It enables you to see all available updates, download the necessary files from the internet and upload updates and new content to your navigation device.
It can also be used to create and restore backups, and to move or copy contents between the PC and the navigation device.