San Disk Extreme PRO SD UHS-I card Our most powerful SD UHS-I memory card yet delivers performance that elevates your creativity. With shoot speeds of up to 90MB/s and UHS Speed Class 3 (U3) (2) recording, you\'re ready to capture stunning high-resolution, stutter-free 4K UHD video (1). And, because your pace doesn\'t let up after the shots are in, it delivers up to 170MB/s transfer speeds for a faster post-production workflow. (1) Full HD (1920x1080) and 4K UHD (3840x2160) video support may vary based upon host device, file attributes and other factors. See the official website. (2) 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 official San Disk website for more details. Shot Speeds up to 90MB/s Perfect for capturing the action as it happens, without missing a beat. Transfer Speeds up to 170MB/s Once the shots are taken, your work is only half-done. Accelerating your workflow means you can carve out more time to take your creativity to the next level. Perfect for 4K UHD Video (1) Sometimes speed is what you need. The San Disk Extreme PRO SD UHS-I card delivers the performance to capture stunning, uninterrupted 4K UHD video (1). (1) Full HD (1920x1080) and 4K UHD (3840x2160) video support may vary based upon host device, file attributes and other factors. See the official San Disk website for more details. Stunning Sequential Burst Mode Shots Rated UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) (2), the San Disk Extreme PRO SD UHS-I card lets you capture sequential burst mode shots without missing a beat. (2) 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, de