Secure Digital High Capacity (SDHC), is a memory card based on the SDA 2.00 specification, introduced by the SD Card Association. This new SDA 2.00 specification that enables SD cards to reach higher capacities - from 4GB all the way up to 32GB. Because SDHC works differently then standard SD cards, this new format is not backwards compatible with legacy SD format host devices, and will therefore require a new card reader. You can surely expect to find a healthy selection of SDHC memory cards and readers here at SuperMediaStore.com.