The microSD / microSDHC (originally introduced as TransFlash) is about a quarter of the size of an SD card and is the smallest standard of SD flash memory specifically designed for use with ultra-small mobile phones and other devices. The microSD/SDHC is ideal for use in storing media-rich files such as music, videos, and photographs in compatible mobile phones. Please Note: Not all devices support higher capacity microSDHC cards. Please contact your device manufacturer for details. To ensure compatibility, look for the microSDHC logo on the product or packaging of your new phone or PDA.