Use a clean, spare SDHC Class 10 card with a capacity of 4GB to 16GB. Never use your original navigation map card to host firmware files, as you risk corrupting your core maps.
C3, C3 Picasso, C4, C4 Grand Picasso, C5 (X7), Berlingo Visual Check rnegdr50br5003 update
I can provide clear guidance tailored exactly to your car's setup! Use a clean, spare SDHC Class 10 card