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Secure Digital High Capacity (SD High Capacity or SDHC) refers to a type of SD flash memory card known as SD 2.0. It includes higher memory storage capacity, ranging from 4 GB to 32 GB. SDHC is not compatible with the SD memory slots designed for older versions.
SD High Capacity cards are a memory card format manufactured by the SD Card Association for cameras, handhelds, phones, tablets, mp3 players and other small devices where large amounts of memory are required for multimedia files and storage. Introduced in 2006, it was the next in line of MultiMediaCards (MMC). More than 8000 models and dozens of types of products have SD card slots for the Secure Digital standard, which is maintained by the Secure Digital Association (SDA). SD 2.0 incorporates a high-speed bus, which doubles the speed already available to give a speed of 25 MB/s.