Hello I have received Yesterday Montana 680t. How do I have to install maps? Can I download free maps from the website?
Thanks

I have a Montana 610, the Montana's are reasonably good devices.
Maps can either go on a micro SD card placed in the device or on the device's internal storage.
If putting maps on a micro SD card, create a folder named Garmin on the card and put the maps in there.
If putting maps on the device's internal storage put them in the Garmin folder.
Any unlocked map for Garmin devices should work ok.

Thanks for the answer. I'm not so expertise so how can I unlock maps? I have download TrekMap Italy V5Pro and installed on the Sd card. Base camp see this map but on the GPS it is not in the available list maps

No probs, look here - www.navitotal.com/post174916.html#p174916 for gimgunlock.
Instructions included.