I would love to be able to update the maps on my Toyota micro SD card which date back to 2013 Q3 yet Toyota claim "these are the most up to date"
There are other posts touching on why this cannot be done, for instance another card will not work, the unit gives "check the card message"
Presumably this is because the original card is locked using it's CID.
However the files on the original card can be changed, I have tried changing the map and licence files using ones that work fine in a Nexus 7 but these give the message "inactive map" The original map is still loaded and running in the unit which I think is normal until the battery is disconnected then it reloads from the card.
Any information on this subject would be very gratefully received, I am happy to test out any suggestions.