Micro SD
micro sdis a format for removable flash memory cards which is derived products of Sandisk TransFlash. It is used in mobile phones, handheld GPS devices, portable audio players, video games consoles and expandable USB flash memory drives. Currently smallest memory card of 15mm X 11mm X 1mm size, about a quarter size of n SD card is available in the market. MicroSD cards are available in capacities from 64MB to 8GB. Cards at beyond 4GB are available only in newer SDHC format.