Did you use another filesystem than what they came with? Possibly you overwrote the section where the sdcard stores some important data. Check out this page: ht

Did you use another filesystem than what they came with? Possibly you overwrote the section where the sdcard stores some important data. Check out this page: https://superuser.com/questions/381208/how-can-i-format-an-sd-card-with-a-more-robust-linux-usable-filesystem-with-a-sp https://superuser.com/questions/381208/how-can-i-format-an-s...