SDXC is the latest type of memory card released in 2010 which meets the demands of FULL HD recording in terms of capacity and speed. The SDXC card has the same dimensions of a SD and SDHC card, but is ONLY compatible with SDXC devices. SDXC cards begin at 64GB with speeds upto 104MB/s and have a roadmap to 2TB with speed up to 300MB/s. SDXC uses the exFAT file system to handle large data volumes and files sizes over 4GB. SDXC stands for Secure Digital eXtended Capacity. Because SDXC uses a different file system called exFAT and it works differently than standard SD cards, this new format is NOT backwards compatible with host devices that only take SD (128MB to 2GB) or host devices that only take SDHC (4GB to 32GB). Most host devices built after 2010 should be SDXC compatible. To ensure compatibility, look for the SDXC logo on cards and host devices (cameras, camcorders, etc.).