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The SanDisk Extreme Pro microSDXC 512GB is a high-endurance UHS-I card rated V30, U3 and A2, with claimed read speeds up to 170 MB/s and writes up to 90 MB/s. The A2 rating means faster app launches and in-app performance on Android phones and tablets, while V30 keeps sustained write speed high enough for 4K video. It suits action-camera users, drone pilots, phone storage expanders and handheld gamers who need capacity and speed in one card. Rivals like the Samsung Pro Plus and Lexar Professional 1066x match it on V30 and A2, so the choice comes down to sustained write behavior and the included SD adapter.
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Lowest price we've seen: $179.95 on Nov 8 at Newegg. Tracked across 1 store since Nov 8.
Owners rate it very highly, praising reliable 4K recording in action cameras and drones and fast file transfers. Complaints center on cards that failed or arrived counterfeit, and on write speeds that fall short of the headline number in some devices.
