Insert the microSD card into the device's slot and turn the radio Automatic Start:
Many users confuse firmware with maps. While maps reside on an SD card, the firmware tells the device how to read that map data. Without a recent firmware update, your San Diego 530 may not recognize modern map files (e.g., larger POI databases or newer road formats). blaupunkt san diego 530 firmware update
(in German, since Blaupunkt was German): Insert the microSD card into the device's slot