Using the Caravan club sat nav downloads

Hi there,

I am new to the club and also to caravaning, and am really enjoying learning all about touring.

My question is: Has anyone used and successfully installed the Garmin Club site download files?

I have downloaded them and have put them onto the memory card but the sat nav doesn't recognise the files..

My sat nav is the Nuvi 40, any ideas anyone??

PS loving the club so far, haven't actually visited one of the sites yet but hope to soon and they look stunning on the gallery videos.