If I ask you to think of companies making sat-nav equipment I doubt you’d offer the RAC.
I just want it to show me the best routes to take for my journey.
Connecting the sat nav to the PC resulted in the installation of Windows Mobile Device Centre which I had not heard of before.
This presented me with a list - settings; music & videos; photographs and files.
In this case you update the maps on your sat-nav using Garmin Express which you download from Garmin's website and install on your PC or Mac.
Once downloaded and installed, the update process is relatively straightforward.