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

Extra-small storage for portable devices Small-format, high-capacity storage. The microSD High Capacity (microSDHC) card is about 1/4 the size of a Secure Digital (SD) card and provides fast, durable, portable storage. Securely holds any data. Safely and securely stores photos, music, videos and other files. Space-saving design for today's portable devices. Specifically designed for use with ultra-small mobile phones, cameras and other devices that use microSD media. Expanding memory capacity makes a great upgrade. Includes a card reader and SD adapter. Includes a MicroMate(TM) SD/SDHC compatible, Hi-Speed USB 2.0 reader to help your transition from the microSD format to the microSDHC format. Also comes with a full-size Secure Digital (SD) adapter to fit into devices with an SD slot. Important compatibility note: The microSDHC card is compatible only with devices that support microSDHC or SDHC; it is NOT backward compatible with legacy (i.e., standard) SD host devices. Please check with your device's manufacturer for compatibility information. Backed by the manufacturer's 5-year limited warranty. SanDisk(R) microSDHC(TM) 4GB Memory Card With Card Reader is one of many Secure Digital & Micro SD Memory Cards available through Office Depot. Made by SanDisk.