Update Garmin maps in Honda car

Hello all,

I have a Honda Civic car with Garmin integrated GPS system.

I want to update the maps, it has SD card to store the maps. I put an other SD card in the system and it says: SD UNLOCK NG

I try to read the original SD card in the PC and it doesn't read. It looks like it is encripted.

Anyone has a Honda car with integrated Garmin GPS system?

I will appreciate your help.

Thanks and best regards.