CID changeable sd-cards and micro-sd-cards are normal cards which additionally allow you to use them for some "special" operations,
for example to update your car's navigation software.
For example, the Vehicle navigation system , radio/gps infotainment systems require a special custom sd-card made by car manufacturers (like Mazda,Nissan,Volkswagen, Seat and Skoda) in order to update the maps software. These sd-cards need to be password-locked and can be used only in one specific car.
