I am still a user and trying to learn as much as I could.
My Garmin nuvi 2455lmt unit is preloaded with the North American Map version. So, I believe the unit 's main map is gmapprom.img.
I got this latest map for traveling in Australia and New Zealand (thank you). Now, I need help so that I can use the map.
My Garmin doesn't have enough space for me to install the new maps. So, I need to install the new maps on a new SD card.
Should I just create a folder called \garmin and just copy the gmapsupp.img file to the \garmin folder?
When I start my Garmin, I just need to select the SD card and it should work?
Are there any files I need to copy? If so, what do I need to put in the \garmin folder other than the gmapsupp.img file??
Please help. My head is spinning.
Thanks in advance.



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