Kingston's standard Secure Digital (SD) memory cards combine massive storage capacity, blazing data transfer rates and ironclad security in a memory card no bigger than a postage stamp. Kingston's SD cards are ideal expansion option for the smallest of devices including MP3 players, digital cameras, PDAs, smartphones and more. For added reliability and durability, the solid-state SD memory cards are built of non-volatile memory components and have no moving parts. Quickly and easily download and transfer digital files between various digital devices, a computer and the Internet. An optional SD memory card reader makes it easy to upload files from an SD memory card to a computer.