My Garmin 205 (a cheaper version, I know) has a file on it called "Current.gpx" that has the active route and tracks that I've made. After plugging into a USB port, I can transfer it to my computer and isolate and manipulate the tracks and bring them into MapSource.
At some point, I hope to decipher the route encoding, so as to be able to upload a route by replacing the Current.gpx file. I don't know if the Nuvi 500 does that on its own.
At some point, I hope to decipher the route encoding, so as to be able to upload a route by replacing the Current.gpx file. I don't know if the Nuvi 500 does that on its own.