Getting the best SD cards can make a big difference, regardless of whether you're a casual shooter or a professional photographer. SD cards have seen major changes to the way they're manufactured and have since gotten new performance classifications.
Short for Secure Digital, SD cards have been the most popular form of flash memory for digital files for some time now. These days, they are most closely associated with cameras and audio kits, which means their integral to content creators, as well as regular folks who use an actual compact camera or a mirrorless camera. (Android phone shooters require one of the best microSD cards to expand their phone's memory.)
But, no matter the kind of user you are, not just any SD card will do. Choosing the best SD card isn't just a case of finding the one with the biggest numbers on it. These numbers are a good indicator of size and speed, even intended purpose. However, manufacturers often emphasize the best possible outcome, which means that real-world tests are a better indicator of how a card performs on a day-to-day basis.
We've speed-tested, reviewed, and ranked our share of SD cards, so who better to help you find the most ideal one for your needs? We found the best SD cards available right now, with the Transcend SDXC UHS-II U3 at the top. This card has better-than-claimed transfer speeds on test and is shock-proof, waterproof, X-ray proof and more, but there are also plenty of other good cards on this list. Take a look at our top picks below.
The best SD cards 2022 – chosen by our experts
Our stand-out best SD card is the Transcend SDXC UHS-II U3. 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.
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.
Add 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. At such a reasonable price we’re mightily impressed with it – the only thing it seems it can’t do is stop a bullet.
Next on our list is the Extreme Pro SDXC UHS-1 from renowned SD card manufacturer SanDisk. As part of a team of manufacturers that came together to introduce standardization of the SD card market, we’re getting a good, reliable card at a decent price.
While our speed tests show quite a dip in performance when compared to claimed speeds (with our tests revealing a write speed of 63.6MB/s and a read speed of 65.9MB/s), for the money it’s still a very solid buy. Suitable for users that want to shoot stills and some 4K video, you can’t go wrong with the Extreme Pro UHS-I.
For added peace of mind, the card comes with a warranty direct from SanDisk giving you a lifetime guarantee should any fault arise (and by lifetime, they mean 30 years). Not bad, considering we probably won’t even need SD cards that far into the future.
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. However, Lexar is renowned for its memory card line-up and the 633X UHS-I performs well under scrutiny.
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. 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.
Actual 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.
Considering the low price these cards go for, they’re surprisingly rugged and well protected against the elements. According to PNY’s internal testing, the Elite Performance SDXC line-up is magnet-proof, shock-proof, temperature-proof and waterproof. This makes it an ideal card for users who want a rugged memory card that can withstand the elements.
Being UHS-I, the Elite Performance is slightly slower than its bigger brothers. With an advertised read speed up to 100MB/s, it fell short of this on our tests at just 65.7MB/s, with read speeds much slower, averaging 20.8MB/s. However, for the average shooter who needs a durable card to capture some stills and a bit of HD video, you can’t really go wrong for the price. If you’re in need of a quick memory fix and need up to 128GB of the stuff, then the PNY Elite performance might be for you.
From one of the biggest names in the SD card industry, the SanDisk Extreme PRO SDXC UHS-II is limited to a maximum of 128GB in card capacity. However, its read and write speeds speak for themselves and more than make up for it. Ideal for 4K and even 8K video capture as well as continuous burst shooting with high-resolution stills in raw and JPEG format, our tests revealed that it performed just around 30MB/s slower than the claimed speeds, with an actual read speed of 268MB/s and write speed of 233MB/s.
Still, the fast V90 and UHS Speed Class 3 (U3) transfer speeds make this card ideal for users that are capturing fast-paced action or sports stills photography. Those who require high-resolution video capture will be glad to get it as well. Plus, this card is fully waterproof, temperature proof, shockproof, and X-ray proof to ensure peace of mind when traveling, too.
Thanks to the UHS-II technology in the 2000X, we can rely on this card for fast read and write speeds. Though slightly more expensive than its competitors, the Lexar name is known for reliability and consistency in performance when it comes to memory cards.
In our real-world tests, we found that the read and write speeds fared significantly better than other cards in its class. It only dipped 19MB/s shy of the claimed write speed at 241MB/s, making it ideal for larger data transfer such as 4K or 8K video recording, with the read speed only lagging slightly behind at 253MB/s.
For stills, this would benefit sports and wildlife photographers, or indeed any discipline that requires rapid bursts of high-resolution photographs. It'll also work nicely for filmmakers needing to capture 4K and 8K on cameras, as it’s one of the fastest in this guide, as shown by its V90 classification.
The Sony SF-G Series Tough UHS-II stands out from the crowd by bringing some extra ruggedness claims. It comes with a premium price, but that isn't surprising considering its build. Branded as dirt, dust, water, and grime-proof by Sony, it’s also purported to be 18x stronger than standard cards thanks to a unique resin-moulded design, which can be felt easily in the hand. It also has a noticeable protective protrusion at the rear.
In our tests, the actual write speeds came back with 246MB/s and with read speeds of 251MB/s, which are both very impressive numbers. This SD card is undoubtedly a little more expensive, but when you consider it’s designed with professional use in mind, it’s a card you can likely take into any situation with a little more peace of mind, whether up an icy mountain or into a sandy desert.
The smallest capacity version of the 1667X SDXC UHS-II is 64GB. That might be a problem for some photographers and videographers who are still shooting slightly lower resolution content or want to grab a small backup card such as a 32GB. However, a UHS-II classification means this card can handle up to 4K video recording and with that comes some hefty files. It’s no wonder there’s no 32GB version. Even if you don't need as much storage space, just think of it as futureproofing your setup.
Matching the claimed read speeds almost exactly at 254MB/s, the 1667X does well when compared to the claimed transfer speeds. Write speeds did drop by about 20% to 101MB/s, which is similar to or better than other cards in this roundup. Consistency, fast speeds and a limited lifetime warranty make the 1667X a very desirable option for creatives who need to capture scenes at higher resolutions.
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.
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.
As is standard with all SanDisk cards, there’s a lifetime warranty, plus it’s shock-proof, waterproof, temperature-proof, X-ray proof and is also classed as UHS speed class 3 and video speed class 3, making it ideal for high-resolution photography and 4K UHD video.
What to look for when choosing an SD card
When it comes to SD card size, we’re talking these days about how much data can fit onto the memory card in gigabytes (or possibly terabytes). It’s important to check your device’s manual to see the maximum card capacity it’s compatible with, as some cameras won’t be able to accept cards over 32GB. The larger the capacity, generally, the more expensive the card. But if you’re planning on shooting lots of high resolution stills or 4K/8K video, you’ll likely want to go bigger (at least 64GB) rather than smaller.
Capacity shouldn't be your only consideration – a card's reading and writing speeds are also crucial to storing the recorded media and for a speedy transfer between devices. Read/write speeds labelled on SD cards are best case scenarios and often hyped by the manufacturer in order to sell more units. Real-world results are often slower (sometimes a lot slower) so check our guide above for a better idea.
There are three main types of SD card: SD, SDHC (high capacity) or SDXC (extended capacity). SD cards typically offer 128MB to 2GB in storage capacity, too small for today’s modern cameras with higher resolutions. SDHC bumps this up from 4GB to 32GB, useful for most photographers and videographers. SDXC cards, meanwhile, range from 64GB to 2TB and are aimed at professional-level users who require more memory.
SD cards are flash memory, which means they have no moving parts and instead rely on electronic chips to store data. While they don’t require power to store data, they can be damaged via water, fire and physical pressure. Some companies offer bespoke 'tough' versions that can withstand these elements, even remaining safe in extreme temperatures, so it's worth looking for those if you're going on an adventure.
5. Stills or video?
Most SD cards are now labelled as either UHS-I or UHS-II. UHS-I cards are typically slower, but are relatively cheap and are most useful for stills photographers. UHS-II cards read and write much faster but are more expensive, and are geared more towards video recording (especially at 4K). If you’re not sure whether a card is UHS-I or UHS-II, flip it over and check how many rows of connections it has – they have one or two rows respectively.
The best SD card FAQs
What SD card speed do I need?
Choosing a new SD card can be confusing with so many classes and speeds available. The main figures to focus on are the 'write' speeds and (to a lesser extent) 'read' speeds. While the main figure on the front of card is likely to be its theoretical 'read' speed (measured in MB/s, or MegaBytes per second), this only tells you how fast you can copy photos to your computer in ideal settings. The more useful number for telling you how quickly your camera can record images to your SD card is the 'write' speed (also measured in MB/s). Faster write speeds are particularly important for shooting sports or action in burst mode.
Card classifications like V30 or U3 are just categorizations of these speeds. There are three main classes: Speed Class (denoted with a number in a circle), UHS Speed Class (a number in an open beaker-like icon), and a Video Speed Class (V followed by a number). The numbers indicate the minimum writing speed when put under data transfer. Speed class is categorized into Class 2 (a minimum write speed of 2MB/s), Class 4 (4MB/s), Class 6 (6MB/s), and 10 (10MB/s). Choosing the best one for your camera depends on your camera's resolution, buffer size and burst shooting speeds. An additional clue is the UHS Speed Class rating, which is U1 or U3. U1 means it can write a minimum of 10MB/s (like Class 10), while U3 pushes the write speed up to a minimum of 30MB/s. More interested in shooting video? The Video Speed Classes are V6, V10, V30, V60, and V90, with V6 suitable for standard definition video recording and V90 capable of 8K video capture. 4K UHD video recording will require a minimum of V10 ideally, and HD video can utilize V6 or below at a push.
How we test SD cards
It’s all well and good comparing card read and write speeds by comparing the numbers on the label, but this rarely gives an accurate account of how well they actually perform in the real world. So we’ve tested them out using specialist speed-tracking software to calculate more realistic data transfer speeds.
We do this by first formatting all cards into the same format system to make sure things are fair from the off. That way, speeds can’t be influenced by the storage system in place on the card. Next we run a storage media testing software on each card which works by filling up the entirety of the card with data and reading it back off the card. This tests both write and read speeds in the same process to give reliable, real-world results that we’d expect to see when shooting photos or videos.
This is a much fairer way to measure transfer speeds between cards. Trying to test speeds by using a device would introduce anomalies. For example, using a DSLR on burst mode and taking photos would firstly take a long time to fill up a large capacity card. Then you have to take into account not every frame will be exactly the same as light levels and colors affect the size of the file capture. Not to mention the time it would take to run it through every card. You’d also be wearing out devices before their usable lifetime, so we use speed-tracking software instead.