Secure Digital (SD) cards are removable flash - based storage devices the use of which is licensed by the SD Card Association. These devices are largely used in consumer devices such as digital cameras, PDAs, and portable music devices. Their small size, relative simplicity, low power consumption, and low cost make them an ideal solution for many applications.
SD cards come p reformatted with the FAT or FAT 32 file system, for storing and organizing files and the data they contain to make it easy to find and access them.