SanDisk Extreme 1 TB microSDXC Memory Card + SD Adapter with A2 App Performance + Rescue Pro Deluxe, Up to 160 MB/s, Class 10, UHS-I, U3, V30

Product Information

These standards cover the speed of the interface between the microSD card and your device (or memory card reader), as this can also limit the maximum speed of data transfers between the two. UHS-I has a maximum speed of 104MB/sec, and you’ll usually see a Roman numeral “I” beneath the U1 logo. UHS-II takes that up to 156MB/sec (with data transferring in both directions) or 312MB/sec (with data transferring in only one direction). If you're looking for the best microSD card for fast data storage between devices, you're not alone. If you are worried about your memory card reporting larger than its real capacity, the next test using the free H2Testw tool is going to identify such cards. Please note that the test is going to take time – the tool must go through each sector as it writes data, then it has to re-read and verify all that information. So if you have a large capacity memory card that is very slow, it could take hours to complete. Please note that if you are planning to perform this test, you can completely skip the speed tests above, as the tool actively reports read and write speeds of the memory card.

Sandisk Extreme 1TB microSDXC card review | TechRadar

If the memory card you are using is fake, it will report errors and show how much actual data was written and read from the card. In the case above, I used a genuine 16 GB SanDisk Extreme Pro memory card that I retired a while ago and as you can see, the software not only showed zero errors, but also reported an average read and write speed of 70 MB/sec. If you perform a similar test and you see errors, you are dealing with a fake or a failing memory card! Get faster app performance for an outstanding smartphone experience thanks to the SanDisk Extreme® microSD card’s A2 Specification.We wrote: "The Lexar Play 1TB is the latest to join the 1TB group but it does so with a whimper rather than a bang. Its rather strange behavior in our real life tests combined with average pricing mean that it misses out on the top spot."

SanDisk Extreme® microSDXC™ UHS-I CARD, 4K UHD, Full HD

Get faster app performance for an outstanding smartphone experience thanks to the SanDisk Extreme® microSD card’s A2 7Specification.The Integral Ultima Pro might be cheap, but it’s still capable of respectable speeds. We logged its sequential read speeds at 96.1MB/sec and its sequential write speeds at 87.4MB/sec, although it came in slightly slower on our random read/write tests. 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. Overall, that makes this card an impressive buy at a reasonable cost. This card is ideal for high resolution, rapid-fire stills photography and 8K video, with 4K and HD video being recorded comfortably, too. Our SanDisk Extreme SD UHS-I V3 tests saw write speeds live up to its claims, matching them almost exactly at 71.6MB/s. 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. All can be forgiven, though, bearing in mind the extremely low cost of these cards, especially while still offering such high capacity to users at up to 256GB sizes.