SDXC is the newest standard for SD memory cards. It supports storage capacities from 32GB – 2TB! Some of the newest digital cameras and camcorders support the SDXC standard. Apart from the extended storage capacity it also benefits from higher speeds, for faster capture and retrieval of data. There are two Ultra High Speed classes, UHS I and II. UHS-I supports 50MB/s – 104MB/s and UHS-II supports 156MB/s – 312MB/s.
With all the different standards it can be confusing, and the question in everyone’s minds is, what will work in my camera or camcorder? The answer is, always use the correct memory card standard supported by your device or recommended by the manufacturer. SDXC memory cards work in devices that support SDXC format. SDHC memory cards will work in devices designed for SDHC and also SDXC format. SD memory cards will work in all SD formats. If you have an older device which supports SD memory card, then your choice is limited to SD only. Even though, newer devices can still use the older SD standards you cannot enjoy the benefits of extended capacity and high speed.