... for FAT 32 file formats. In addition, SDHC cards use new speed "class" ratings known as Class 2, 4 ,6,8 ... identical in size to today’s standard SD card, the new SDHC cards are designed differently and are only recognized by ... ’s high capacity and speed, it’s widely used in DV, digital camera, GPS, mobile phone, Bluetooth equipment, PDA and mp4 etc ...