Our latest format and capacity in our SD card family is the 4GB SDHC (SD High Capacity). With 4GB of storage this card is able to keep up with your most demanding photo, video, music and data storage requirements. These cards are designed for optimum (Class 2) performance with SDHC devices, are supported in environments supporting FAT 32 files formats and include a USB card reader. While similar in size to standard SD cards, our 4GB SDHC cards will only be recognized by SDHC devices so look for SDHC logos on host devices.