Some recent cameras format SD cards as exFAT. This format cannot be used for autobooting - you must reformat these cards as FAT32 on your PC. Note also that most newer cameras do not support dual partition CHDK booting.
Some recent cameras format SD cards as exFAT. This format cannot be used for autobooting - you must reformat these cards as FAT32 on your PC. Note also that most newer cameras do not support dual partition CHDK booting.