What file are the favourites on the Nuvi 660 stored in. I have loads of locations I would hate to lose if it crashes or gets nicked. Is it also possible to convert them back to CSV to have access to printing them off?
In Garmin nuvi series, favourites are in the file 'current.gpx' in the Garmin/gpx folder. You can easily view or edit your favourites on your PC.
It will open your favourites on your computer by USB. To convert it to .csv format, you can use the online GPS conversion tools on this forum like a free POI converter program GPXtoPOI.