Sandisk SDSDRX3-064G-A21 Extreme SDXC UHS-I Card Extreme Speed up to 45MB/sec* read/write speeds for faster shot to shot performance and faster downloads Extreme Full HD video recording with both UHS Speed Class 1 for the new UHS-I Bus I/F and Class 10 for High Speed Bus I/F to capture Full HD (1080p) Extreme Capacities with up to 128 GB capacity for more Full HD video and more uncompressed maximum file size images Compatible with SDHC and SDXC supporting devices