SD High Capacity (SDHC™) card is the new SD™ memory card based on the SDA 2.00 specification, introduced by the SD Card Association. This new SDA 2.00 specification enables SD cards to reach higher capacities - 4GB-32GB*.
Because SDHC works differently than standard SD cards, this new format is not backwards compatible with legacy SD format host devices. 4GB* SDHC cards can only work with SDHC compatible host devices, such as digital cameras and camcorders. To ensure compatibility, look for the SDHC logo on cards and host devices.
What is Class Speed Rating?
The SD Association has created and defined 3 speed classes to help you identify speed and performance capabilities/minimum requirements of SD/SDHC cards and the host products. The SD Speed Class Ratings specify a minimum sustained write speed for SDHC cards.
The Speed Classes are:
- Class 2 - 2MB*/second
- Class 4 - 4MB*/second
- Class 6 - 6MB*/second
- Class10- 10MB*/second
Look for these logos to identify your class rating:
OPTION 1OPTION 2
*Please note: For Flash Media Devices, 1 megabyte = 1 million bytes; 1 gigabyte = 1 billion bytes. Actual usable capacity may vary. Some of the listed capacity is used for formatting and other functions, and thus is not available for data storage.
