Lexar Platinum II 300x SDXC 64GB UHS-I/U1 (Up to 45MB/s Read) Flash Memory Card - LSD64GBBNL300 High-speed performance, start to finish Leverages UHS-I technology for transfer speed up to 300x (45MB/s) Designed for fast-action photography and HD video Speed rated at Class 10 High-capacity options for HD video archival or laptop memory expansion