But as with most other cards on this list, the read speeds leave a bit to be desired, coming in at almost half the claimed speed, 71.6MB/s. Our SanDisk Extreme SD UHS-I V3 tests saw write speeds live up to its claims, matching them almost exactly at 71.6MB/s. With capacity starting at 16GB, this is a brilliant option for those who need an inexpensive backup card to throw in their camera bag – and it doesn't lag too far behind the others in real world performance, either. We found its write speed to be a little slow compared to other UHS-I cards in this class range, but it’s good value for money and the V30/U3 class listing means it’s still suitable for up to 4K UHD video recording.Īctual transfer speeds under our testing churned out a write speed of 33MB/s and read speed of 82MB/s not too bad, but the write speed is close to the minimum V30 classification on the label, so that's worth bearing that in mind if write speeds are important to your work. While the higher capacity cards increase in price exponentially, the 633x appears in sizes as small as 16GB, making it suitable for a wide range of photographers and videographers alike who require all kinds of capacities for casual or professional use. However, Lexar is renowned for its memory card line-up and the 633X UHS-I performs well under scrutiny. Since Lexar’s announcement of the world’s first consumer 1TB SD card back in 2019, there have been several manufacturers that have jumped into the game.

At such a reasonable price we’re mightily impressed with it – the only thing it seems it can’t do is stop a bullet. This card is ideal for high resolution, rapid-fire stills photography and 8K video, with 4K and HD video being recorded comfortably, too.Īdd that to the card's waterproofing, shock proofing, plus the fact that it’s X-ray proof, temperature resistant and static proof, and we have a card that is designed for use in almost any conditions. Overall, that makes this card an impressive buy at a reasonable cost.

The Transcend did superbly in its speed tests, excelling the claimed write speed (180MB/s) with a whopping 224MB/s, but falling slightly short on the read speed with 224MB/s. With a Class 10, V90, U3 and UHS-II rating, we thought it would be fast enough to capture almost anything modern devices could throw at it, but we weren’t expecting the speed results we got. Our stand-out best SD card is the Transcend SDXC UHS-II U3.

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