Our most powerful SD UHS-I memory card yet delivers performance that elevates your creativity. With shot speeds of up to 90MB/s(1) and UHS speed Class 3 (U3)(4) recording, you�re ready to capture stunning high-resolution, stutter-free 4K UHD video(3). Transfer speeds of up to 100MB/s(1) deliver faster postproduction workflows. | (1)Up to 100MB/s read speed. Write speed up to 90MB/s. Based on internal testing; performance may be lower depending upon host device. 1MB=1,000,000 bytes. X = 150KB/sec. (4)UHS Speed Class 3 designates a performance option designed to support 4K UHD video recording with enabled UHS host devices. UHS Video Speed Class 30 (V30), sustained video capture rate of 30MB/s, designates a performance option designed to support real-time video recording with UHS enabled host devices. See the SD Association�s official website. (3)Full HD (1920x1080) and 4K UHD (3840 x 2160) video support may vary based upon host device, file attributes and other factors.