The MMC and SD cards are for multimedia consumer applications and mobiles devices such as handheld PCs, digital cameras, MP3 players and mobile phones to store, copy, and transfer data similar to hard disk drives. With capacity ranging from 32MB to 512MB, these cards have durability (mating cycle) up to 10,000 cycles.
If you're looking for a cost-effective solution with quick access time and durability of data storage, then look for Advance Modules MMC (Multimedia card) and SD (Secure Digital) cards; the high performance Flash based storage devices.
Flash Memory