Samsung EVO+ 64GB Class 10 UHS-1 SDXC Memory Card, Up to 80MB/s Read, Up to 20MB/s Write Speed Samsung EVO+ 64GB Class 10 UHS-1 SDXC Memory Card - Samsung 10 Year Limited Warranty This Item Includes: Class: 10 Interface: UHS-I, compatible to HS interface Capacity: 64GB, (1GB=1Billionbyte) Random Read Speed: Up to 80MB/s with UHS-1 interface