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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). Up to 200MB/s read speeds, engineered with proprietary technology to reach speeds beyond UHS-I 104MB/s, require compatible devices capable of reaching such speeds. Write speed up to 140MB/s. Based on internal testing; performance may be lower depending upon host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes. X = 150KB/sec. [64-128GB] Up to 200MB/s read speed. Write speed up to 90MB/s. Based on internal testing; performance may be lower depending upon host device. 1MB=1,000,000 bytes. X = 150KB/sec. [32GB] Up to 100MB/s read speed. Write speed up to 90MB/s. Based on internal testing; performance may be lower depending upon host device. 1MB=1,000,000 bytes. X = 150KB/sec. 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
SanDisk Extreme Pro 32GB SDHC UHS-I Card (SDSDXXG-032G-GN4IN) SanDisk Extreme Pro 32GB SDHC UHS-I Card (SDSDXXG-032G-GN4IN)
Often, fast sequential speeds come at the expense of random read/write speeds, but the A2-class 1066x is an exception; it’s not as speedy as the Integral Ultima Pro Professional High-Speed card below, but it’s faster than the SanDisk Extreme Pro and Samsung Evo Plus on this count, making it a fine all-round performer. If you’re looking for a card that can run apps or cover video on your mid-range or high-end smartphone, you won’t get much better than this. As usual, the SanDisk Extreme PRO 300MB/s SDHC/SDXC UHS-II cards measure 24 x 32 x 2.1mm, which means they slip neatly into a camera or card reader’s slot. After heavy use, the 64GB card that I have been using shows only slight signs of wear on the label.
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Switching to record Fine* Jpegs boosted the burst depth significantly to 65 images, but that’s someway behind what was possible with the Lexar Professional 2000x SDHC/SDXC UHS-II, Kingston Canvas React Plus SDHC/SDXC UHS-II and PNY X-Pro 90 SDXC UHS-II cards. Shooting Fine-quality Jpegs increases the burst depth again, but at 78, it’s still behind the other cards I’ve tested recently, only beating the Manfrotto Professional SDXC UHS-II card. We test microSD cards in a high-speed USB microSD card reader, connected to a laptop via a USB 3.2 Gen 2 Type-A connection. We use a combination of the CrystalDiskMark and AS-SSD benchmarks to test both sequential read and write speeds and random read/write speeds. I’ve tested the 300MB/s version which is available with capacities of 32GB, 64GB and 128GB. The 32GB card is an SDHC device, whereas the 64GB and 128GB cards are SDXC devices. Use our super easy product search to filter down and find exactly what you need. Filter by Category, Type and Brand to return the perfect product for you. Despite being rated faster than the Lexar 1000x, the Lexar Professional 1066x actually uses the slower UHS-I interface. This turns out not to be a big deal, though, as we still measured sequential read speeds of up to 157MB/sec and write speeds of 80MB/sec on our 64GB sample, with the faster 128GB to 512GB versions capable of over 120MB/sec.
SanDisk 32GB Extreme PRO CompactFlash Memory Card UDMA 7 SanDisk 32GB Extreme PRO CompactFlash Memory Card UDMA 7
The best microSD cards to buy in 2023 1. Integral Ultima Pro Premium High Speed: Best-value microSD card at higher capacities Sequential speeds matter most for copying large files and sustained data transfers, as they do when streaming 4K video to a phone or tablet, or recording 4K video from an action cam. Random read/write speeds are more important if you’re running apps or games from a microSD card installed in a smartphone or handheld gaming device.
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With shot speeds up to 140MB/s 6 the card is perfect for capturing the action as it happens, without missing a beat. Also, despite chalking up impressive read and write speeds of 252MB/s and 207MB/s respectively, the SanDisk Extreme PRO 300MB/s SDXC UHS-II proved to be one of the slower cards when it comes to moving files onto a computer. The shortest time I was able to transfer 100 Fine* Jpegs and 100 14-bit uncompressed raw files from the Nikon Z 7II (adding up to 9.7GB), was 2 minutes 37 seconds - that’s minute slower than the Lexar Professional 2000x SDHC/SDXC UHS-II. Sometimes speed is what you need. The SanDisk Extreme PRO SD UHS-I card delivers the performance to capture stunning, uninterrupted 4K UHD video 1. What’s more, this card comes into its own on random read/write speed tests. Here, we saw the fastest performance we’ve seen from a microSD card, reaching speeds of over 12MB/sec. Other cards from Lexar, Kingston and Samsung are catching up, but this is still the speed king for app and game performance. Given that it’s only slightly more expensive than the basic Ultima Pro, that makes it one of the top options for smartphone or Switch use. Rated UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) 2, the SanDisk Extreme PRO SD UHS-I card lets you capture sequential burst mode shots without missing a beat.
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