UHS Speed Class 3 (U3) designates a performance option designed to support real-time video recording with UHS-enabled host devices. 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 www.sdcard.org/consumers/speed. Since 1982, PCMag has tested and rated thousands of products to help you make better buying decisions. See how we test.

SANDISK Extreme Plus Class 10 microSDXC Memory Card - Currys SANDISK Extreme Plus Class 10 microSDXC Memory Card - Currys

For 64GB-1TB: A2 performance is 4000 read IOPS, 2000 write IOPS. For 32GB: A1 performance is 1500 read IOPS, 500 write IOPS. Results may vary based on host device, app type, and other factors.Capture fast-action photos or shoot 4K UHD video 2 with write speeds of up to 130MB/s. 9The SanDisk Extreme® microSDXC™ UHS-I Card lets you shoot more and faster. I'm that 5G guy. I've actually been here for every "G." I've reviewed well over a thousand products during 18 years working full-time at PCMag.com, including every generation of the iPhone and the Samsung Galaxy S. I also write a weekly newsletter, Fully Mobilized, where I obsess about phones and networks. Comparison based on internal testing of SanDisk Extreme® microSDXC™ UHS-l card, versus current UHS-l cards with 100MB/s stated performance. Results may vary based on host device, file attributions, and other factors.

SanDisk Extreme microSDXC card plus SD adapter plus RescuePRO SanDisk Extreme microSDXC card plus SD adapter plus RescuePRO

Get faster app performance for an outstanding smartphone experience thanks to the SanDisk Extreme® microSD card’s A2 7Specification. Thebig differences came when I was copying files from the laptop to the card, a common thing you'd do if you want to play movies on your phone.As you can see in the chart below, the SanDisk Extreme and Lexar 633x cards were much faster than any of the competitors. The Galaxy Note 3's SD card speeds seem to max out at around 20MBps both reading and writing. Only the Extreme card hit both limits. You don't have permission to access "http://www.argos.co.uk/browse/technology/camera-accessories/memory-cards/c:30184/memory-card-type:microsdxc/" on this server.The most intense video-recording use in mobile today is recording 30 frame per second, 4K video; the Mobile Extreme card had no trouble with that, either.

SanDisk Extreme microSDXC card plus SD adapter plus RescuePRO

The SanDisk Extreme outperformed both the similarly-priced Leef Pro and the more expensive Lexar 633x, as well as slower SanDisk Mobile Ultra and Kingston Class 4 cards we were using to compare. Compatible device required. Full HD (1920x1080) and 4K UHD (3840 x 2160) support may vary based upon host device, file attributes, and other factors. See www.sandisk.com/HD You don't have permission to access "http://www.argos.co.uk/browse/technology/camera-accessories/memory-cards/c:30184/brands:sandisk/" on this server.

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MicroSD memory cards can help make a cramped phone or tablet feel roomy.They're an affordable way to expand space, often costing less than the price of jumping up to the next level of internal memory. Many Android and Windows phones and tablets, especially models by Samsung and LG, have microSDslots, and many people swear by them.