The SanDisk Extreme SD UHS-I memory card saves valuable time when transferring media files with a read speed of up to 180 MB/s, thanks to SanDisk QuickFlow technology. When combined with the SanDisk Professional PRO-READER for SD and microSD cards, you can achieve maximum speed (sold separately). With write speeds of up to 130 MB/s and UHS Speed Class 3 (U3), you can capture high-resolution, lossless 4K UHD video recordings. Save time during transfers with speeds of up to 180 MB/s thanks to SanDisk QuickFlow technology (128 GB–256 GB, up to 170 MB/s for 64 GB). Perfect for 4K UHD videos and burst mode continuous shooting. Lossless video recording is ensured with UHS Speed Class 3 (U3) and Video Speed Class 30 (V30).