If you’re lucky enough to have a new Nintendo Switch 2 in hand right now, you’re probably filling it up with old and new games alike. The console comes with 256GB of storage built in; that’s eight times more than the original Switch and four times more than the Switch OLED. But the new console’s improved performance means that some games will hog a ton of that space. Take, for instance, Cyberpunk 2077, which is a 59GB download, while Split Fiction checks in at 69GB. While not all titles hog so much storage, there’s a good chance you’ll want to add more space to your Switch 2 as time goes on.
You’ll need a microSD Express card to do that. These are not the same as the standard microSD cards you may have for the first Switch or other gaming handhelds. They’re newer, faster and (as to be expected) more expensive. But if you want more space, they’re your only choice. If you’re looking to grab one today, we’ve laid out the best microSD cards for the Switch 2 and broken down what you should know before you buy.
The best microSD cards for the Switch 2 (and why you might want to wait to buy)
The Switch 2 is the first mainstream device to require microSD Express for storage expansion, so there aren’t many options available to buy just yet. To make things easy, here’s a list of every microSD Express card we’ve seen at retailers at the time of writing.
128GB
256GB
512GB
1TB
Nintendo says the Switch 2 technically supports cards with a capacity up to 2TB, but we haven’t seen any microSD Express model go beyond 1TB just yet. It’s also worth noting that GameStop and Onn (Walmart’s in-house electronics brand) aren’t manufacturers, so it’s unclear who exactly is making their cards.
Stock for these cards remains somewhat patchy, particularly for the higher-capacity options. But many of the 128GB and 256GB models appear to be steadily available as of the Switch 2’s launch week. Just be warned that you may have to deal with extended ship times in some cases. SanDisk’s microSD Express Card has also increased in price since it first went up for sale in February; originally, it cost $45 for 128GB and $60 for 256GB.
Either way, all of these cards are far pricier than traditional microSD options. The Samsung Pro Plus, for example, costs $17 for 128GB, $25 for 256GB, $43 for 512GB and $90 for 1TB as of this writing.
Remember: You’re looking for microSD Express, not “Extreme,” like the branding SanDisk uses for some of its conventional microSD cards. A microSD Express card will have a big “EX” logo printed on it — if you see that, you should be good to go.
We’ve already tested SanDisk’s Express card and the Lexar Play Pro for our broader guide to the best microSD cards. Between the two, SanDisk’s card has much faster sequential read speeds — up to 899 MB/s vs. 712 MB/s in CrystalDiskMark, to name one benchmark — which theoretically makes it better equipped to reduce load times.
The Play Pro is quicker for sequential writes (up to 720 MB/s vs. 650 MB/s), available in more sizes and should be cheaper at 256GB whenever it’s in stock. (SanDisk says the 128GB version of its card has slower sequential writes than the 256GB model, too.) Random performance is about equal, so the two should be similarly adept at keeping large games like Mario Kart World running smoothly.
We mainly tested those cards on a Windows PC and Mac, though. How they perform on the actual Switch 2 remains to be seen. Nintendo didn’t send out early review units to press, and we’ve only just received our own retail model. So we’ll need a few more days to finish testing.
For now, though, we can’t say for sure if the console renders all microSD Express cards to similar speeds. That was largely the case with the first Switch: Once a (regular) microSD card hit a certain threshold of performance, there wasn’t that much practical difference between it and other alternatives. The Switch 2 is working with a different standard, but if something similar were to happen again, the “best” microSD Express card would simply be the most affordable one from a reputable brand in the capacity you want.
That brings us to our main piece of advice: If you can hold off on buying one of these things early on, that’s probably a good idea. It’s not just about the lack of testing — truthfully, we’d be surprised if any of these cards are truly “bad.”
It’s more about value: Barring more tariff shenanigans, all of these cards are as expensive today as they’re ever likely to get. The Switch 2 is already popular and will continue to be, thus more microSD Express cards will need to be made and prices will (eventually) come down. Try to use all 256 of the gigabytes baked into the Switch 2 first, even if it means having to delete a game or two. But if you’re absolutely sure you want more space right away, the cards above should be good enough.
What are microSD Express cards?
Most microSD cards are based on a standard called Ultra High Speed (UHS), of which there are three versions: UHS-I, UHS-II and UHS-III. The vast majority of cards you may have bought in the past utilize UHS-I. These have one row of pins in the back and a theoretical maximum data transfer speed of 104 megabytes per second (MB/s). (Though many cards are able to surpass that limit with proprietary tech and card readers.) The original Switch has a UHS-I microSD slot, as do most other gaming handhelds like Valve’s Steam Deck.
UHS-II cards add a second row of pins and can reach up to 312 MB/s. These are pricier and much less common than cards based on UHS-I, but they’re supported by some cameras and higher-power handhelds like the ASUS ROG Ally X. UHS-III, meanwhile, is twice as fast as UHS-II in theory (624 MB/s), but no microSD cards have actually used it.
UHS-I cards have held on over the years because they’re cheap, widely supported and fast enough for the things most people need them to do: record 4K video, stash photos and so on. But with the Switch 2, Nintendo needs more. The new console is dramatically more powerful, which allows it to run demanding games that may have originally been built for stronger hardware like the PlayStation 5, Xbox Series X or gaming PCs. The device also uses UFS 3.1 storage internally, which is much speedier than the eMMC storage used by the original Switch. (A custom file decompression engine helps improve load times as well.) So if the Switch 2 is going to accept microSD cards, it needs ones that won’t bring a serious drop-off in performance and can hold up with modern games.
Hence, SD Express. This standard has technically been around since 2018 but mostly went nowhere until the Switch 2 came along. It also uses a second row of pins, but it lets microSD cards take advantage of the PCI Express (PCIe)/NVMe interface, which is the same underlying tech used by modern SSDs. As a result, it can produce considerably faster read and write speeds, with a current theoretical maximum of 985 MB/s.
As noted above, real-world performance won’t be quite that fast. Even if it was, the best microSD Express cards would still be much slower than the NVMe SSDs used by the PS5 and Xbox. (Sony recommends SSDs with sequential read speeds of at least 5,500 MB/s.) And they’ll fall well below their peak speeds under sustained loads: SanDisk, for instance, says sustained write speeds for its 128GB Express card can drop as low as 100 MB/s.
But they’re still a marked improvement over old UHS-I cards, and in theory, they should be quicker than some older SATA-based SSDs when it comes loading game levels, asset streaming, retrieving saves or copying games to external storage. Whereas SanDisk’s microSD Express card can produce sequential read speeds around 900 MB/s, Lexar’s Professional Silver Plus — the top UHS-I pick in our general microSD card guide — topped out just over 200 MB/s, and that’s with a proprietary reader. (On the first Switch, it’d be closer to 100 MB/s.) Sequential writes and random speeds were three to four times better as well, and sometimes even more depending on the benchmark we used.
It remains to be seen how well these Express cards will hold up with extended use, and there’s no way to know exactly when their sky-high prices will drop. Non-Switch 2 devices that support microSD Express are still exceedingly rare, and the standard itself isn’t backwards compatible with UHS-II, so you’ll be limited to UHS-I speeds if you want to use your card with another device (unless you buy a pricey external reader). Still, while the increased costs and limited selection are annoying, the tech itself seems worthy of a next-gen Switch.