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Best MicroSD Memory Cards

We test the latest MicroSD, MicroSDHC, MicroSDXC memory cards to find out which is the fastest.

| Lexar Professional SDHC 600x 32GB Class 10 U:1 in Memory Cards
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If you're looking for a new MicroSD card for your camera, smartphone, or tablet, then it would make sense to buy the fastest and most reliable card available. Here's what 688GBs of MicroSD storage looks like:

Best MicroSD Memory Cards: Best MicroSD Cards

Here is a list of all the cards we have tested, sorted with the quickest average speeds at the top. We tested these cards using a MicroSD USB3 UHS-II card reader to get the fastest possible performance, using CrystalDiskMark. 

Best MicroSD Memory Cards: UHS-II vs UHS-I

We tested the fastest UHS-I and UHS-II cards available to us. To make the most of the high speed available with UHS-II cards, you'll need a camera or device compatible with UHS-II cards, as well as a memory card reader that supports UHS-II. UHS-II cards can be used in UHS-I cameras and card readers, but you won't get the benefit of the additional speed. On the left, above, you can see the extra contacts on the UHS-II card.


Best MicroSD Memory Cards: Top Best MicroSD Cards 2019

When taking photos write speeds are the most important, as this is the speed at which a device such as a digital camera or smartphone can write photos to the memory card, if this is slow, then it may slow down your shot to shot time or the amount of photos you can continuously take. The read speed is important for when you want to view the photos or copy them onto a computer or another device.

  MicroSD Card Tested: Write MB/s Read MB/s Average Recovery Software Buy
1 Lexar Professional UHS-II 64GB 64.72 195.2 129.96 Best MicroSD Memory Cards: Yes Buy
2 Sandisk Extreme Pro 16GB 81.3 94.68 87.99 x Buy
3 Samsung PRO Plus 64GB 82.34 93.35 87.84 x Buy
4 Transcend Ultimate 633x 64GB U:3 82.19 93.37 87.78 Best MicroSD Memory Cards: Yes Buy
5 Samsung EVO Plus 256GB  80.95 90.48 85.71 x Buy
6 Toshiba EXCERIA 64GB Endurance 68.16 93.11 80.64 x Buy
7 Toshiba EXCERIA 64GB  45.11 94.12 69.61 x Buy
8 PNY Turbo 32GB 42.08 93.48 67.78 x Buy
9 Sony 64GB 69.58 65.13 67.35 x Buy
10 Lexar 633x 32GB U:3 41.5 85.88 63.69 x Buy
11 Integral ultima PRO X 32GB U:3 31.33 92.48 61.90 x Buy
12 Sandisk Ultra 16GB U:1 11.9 45.61 28.75 x Buy

Another important factor to consider is warranty and reliability, ideally, you would want the most reliable card possible so that your photos are never lost, however, if the card does fail then a long warranty will mean that the manufacturer should replace or repair your card. Although recovery of images is unlikely when a card fails physically, recovery software is available to help recover accidentally deleted files, and some of these cards come with free recovery software. 


What is the fastest MicroSD memory card?

The fastest MicroSD memory card we've tested, is the Lexar Profesional UHS-II 64GB card, however, to get the best out of this, you'll need a device that supports UHS-II, and not many do at the moment. It's also got relatively slow write speeds compared to standard UHS-I memory cards. If you're using a UHS-I device, then the fastest MicroSD memory card we've tested is the Sandisk Extreme Pro, with an average combined read/write speed of 87.99MB/s.


What is the most reliable MicroSD memory card?

Reliability can't easily be determined on new cards, as it could take a long time for the card to fail if it ever does. However, one thing to consider is how durable the card is, and if you look at Samsung cards, they are waterproof, shockproof, magnetic proof and come with a 10-year warranty so should survive much more mistreatment than others, as we found out in our test of one of their microSD cards. Toshiba EXCERIA Endurance cards are also temperature-proof, waterproof, x-ray proof, and shockproof, designed to withstand up to 3000 hours of FullHD recording, so would be ideal for an always-on security camera or dashcam.


What is the biggest capacity MicroSD memory card?

The largest capacity MicroSD memory card is the 1TB (1000MB) Sandisk Extreme 1TB microSDXC memory card. This is a Class 10, UHS-I, U3, V30 memory card priced at £288. If you're looking for something more reasonably priced, then there is the Samsung EVO Plus 512GB microSDXC memory card, priced at £85.


Our top picks:


If you're looking for the fastest SD card, have a look at our Top 10 Best SD Memory Cards.

Find out more about memory cards, in our complete guide to memory cards.

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paulfreeman Avatar
3 Aug 2020 8:10AM
Surely the most important factor here when out taking photos is the write speed not the read speed, the "Lexar Professional UHS-II 64GB" is awfully slow with a write speed of only 64.72 MB/s compared with four other cars that are in the 80 MB/s range, that's a huge difference with today's large files, especially when taking multiple shots.

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