why can't I transfer map and tracks from my nuvi350 to Mapsourse?

 

why can't I transfer map and tracks from my nuvi350 to Mapsourse?Who can help me ?Thank you!

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The nuvi 350 doesn't record tracks.

The preinstalled maps from your GPS unit can't be transferred from the unit to MapSource your computer. It doesn't work that way. They would need to be installed from a disk onto your computer.

thank you very much!

thank you very much!