I cant offer much help other than it would be a similar process to buying another memory card and copying even just one of the other cards. The unit wont read a copy as I believe it has some method of blocking copied cards.
I briefly looked but in the end bought a unit with the genuine maps as the hassle didn’t seem worth it and the end result isn’t very reliable according to some web sources.
Yes, I loaded up a OSM European ski map on an 800 alongside the OS maps and it picked it up, though these covered different areas.
If you have 2 maps covering the same area I find it easier to enable / disable them so you only have the one you want active. I use the OS maps offroad but there’s a bit too much detail to read them easily when on road.
In the menu on the Garmin it tells you which maps are on the card and their status (Enabled / Disabled).
Probably a real simple answer but I’m a bit of a tech idiot do bare with me!
I’ve got a Garmin 810 with the European navigator SD card, I’ve also just purchased a 1:50k land ranger card. These are both 4gb. Could I buy a blank 8gb card and combine the two to save remembering to swap the cards/loosing one of them?
Will the garmin find the right maps automatically if I do this, ie. when in France will it switch to the euro map set?