Thank you.
I am not sure which files I need.
I will look in to it further.
Cheers.
Paul.

Hi .
I have managed to format my 660 internal drive.
I have managed to get it booting again but without the maps.
Garmin express will not recognise the Zumo so i cannot update the maps.
as an experiment I copied the system files from a Nuvi 550 to the zumo. garmin express then recognised it as a ...