SanDisk Extreme microSDXC™ memory card saves time in media transfer with read speeds of up to 190MB/s9 with SanDisk QuickFlow™ Technology10 (64GB - 1TB). Combined with SanDisk Professional PRO-READER SD and microSD™ for maximum speed (sold separately). With write speeds up to 130MB/s9, it is perfect for Android™ smartphones, action cameras and drones. This high-performance microSD™ card handles 4K UHD video recording, Full HD video 2, high resolution photos. In addition, the A2 rating gives you high speed application performance and an outstanding smartphone experience.