This here os the Sandisk Mobile Ultra 64Gb MicroSD with Class 6 capabilities. You know what 64 GB means – 30,000 digital photos, 200 albums of music, or over 20 hours of 720p HD movies. And all this comes with a 5 year warranty. The memory card also comes with a Class 6 speed rating which equates to data transfer speeds of almost 48Mbps. That is superfast!