The LSDMI64GBBAS633A from Lexar Retail is a high-performance 64GB microSDXC card designed to cater to the needs of professional photographers, videographers, and mobile device users. Featuring a 633x speed rating, this card supports Ultra High Speed I (UHS-I) interface with Class 10 (C10) performance for seamless video recording and fast data transfer. The U3 and V30 speed class ratings ensure a minimum write speed of 30MB/s, ideal for capturing 4K video content. Moreover, the A1 app performance class rating enhances the running and loading of apps on smartphones and tablets. This card comes with an adapter, making it versatile across devices with microSD or SD card slots.