Hi there and welcome
This is all done via a program called Garmin Express.
You download this program on your computer and can do so via my link below
And it is via this program you do your updates.
If you have any issues or would like any additional information or assistance, please do not hesitate to let me know.
Else if you can take a second to rate my service by clicking one of the stars at the top of the screen then submit, that would be greatly appreciated.