For expandable game storage on Nintendo Switch 2, you need a microSD Express card. A conventional microSD UHS-I card—even one that worked in the original Switch—cannot store or load Switch 2 games. Express cards also work in the original Switch, but there they run at conventional microSD speeds.
What’s the difference for Switch 2?
| Question | Conventional microSD UHS-I | microSD Express |
|---|---|---|
| Store or load Switch 2 games | No. It cannot be used for Switch 2 game storage. | Yes. It is the supported expansion-card standard. |
| Maximum supported capacity | Not applicable for Switch 2 game storage. | Up to 2 TB, according to Nintendo’s compatibility guidance. |
| Use with the original Switch | Supported; Nintendo recommends UHS-I compatibility for the original console. | Also usable, but Nintendo says its read/write speed there is equivalent to a conventional microSD card. |
| First use in Switch 2 | Cannot be used as expansion storage for games; screenshots and videos on it can be imported. | Requires an internet-connected system update the first time it is used. |
| What it can hold on Switch 2 | No Switch 2 games or save data. | Downloaded software, software updates, DLC, screenshots, and captured video. Game save data stays in system memory. |
These compatibility and data-handling distinctions come from Nintendo’s compatibility chart and microSD Express support FAQ.
Why UHS-I speed labels don’t make an old card compatible
UHS-I describes a card-bus interface; labels such as U1 and U3 describe speed classes. Neither a high speed-class marking nor an impressive number printed on an ordinary UHS-I card turns it into microSD Express. Nintendo’s requirement is the Express standard itself, identified by the microSD Express designation and mark.
The SD Association lists up to 104 MB/s for the UHS-I SDR104 bus mode. It describes SD Express as using PCIe and NVMe, with interface ceilings that depend on the specification configuration. These are standards-level interface figures, not measured transfer speeds for a particular card in Switch 2. Nintendo says Express provides faster access than previous microSD models and that the faster standard is needed for games to run smoothly, but its cited support information does not publish a console-specific card benchmark. See the SD Association’s bus-speed overview.
Free tools Windows power users keep installed
One-click scans. No signup required.
#1 Best Overall
- NEXT GEN GAMING: Works with Nintendo Switch 2.
- READY FOR TOMORROW. Ready for future products with a PCIe-NVMe interface; performs at UHS-I speeds with microSD UHS-I and UHS-II devices.
- EXPONENTIALLY FASTER PERFORMANCE. Up to 4.4 times faster transfer speeds than our fastest microSD UHS-I cards [9]. Transfer a 2-hour HD movie in less than 3.5 seconds [1]; save up to 2.8 minutes transferring 60 minutes of 4K UHD video [4] shot at 30 fps when paired with the SanDisk PRO-READER SD Express Dual Card (sold separately) [9]
- DURABILITY YOU CAN COUNT ON: Cards are waterproof, temperature-proof, humidity-proof, drop-proof, shock-proof, magnetic-proof, x-ray proof, and wear-out proof [5].
- HEAT MANAGEMENT REIMAGINED. SanDisk ThermAdapt helps keep devices from overheating with a specially designed enclosure and controller that uses dynamic adaptive thermal management.
What a Switch 2 card can store—and what it cannot
With a microSD Express card inserted, Switch 2 uses it as the default location for downloaded software. It can also hold software updates, DLC, screenshots, and captured video. Screenshots and videos can be moved between system memory and the card.
Game save data is different: Nintendo says it remains in system memory and cannot be copied or saved to a microSD Express card. A card expands space for downloads and media, not for game saves. Nintendo lists Switch 2 internal storage as 256 GB, with some space reserved for system use; its data-management FAQ says no individual game currently requires extra storage to play. See Nintendo’s Switch 2 features page and data-management FAQ.
Rank #2
- TRANSFER SPEEDS UP TO 800 MB/S: With sequential read speeds up to 800 MB/s, get into your game up to 4× faster than our standard microSD cards (UHS I)¹.
- DYNAMIC THERMAL GUARD: Keeps its cool even when the action heats up. Dynamic Thermal Guard helps reduce overheating for fast, smooth gameplay.
- ALL YOUR GAMES ON ONE TINY CARD: Store all your games and downloadable content (DLCs) with up to 512GB of reliable storage. No deleting. No compromises.
- 6-PROOF PROTECTION WITH 3-YEAR LIMITED WARRANTY: Built to last, made for peace of mind. Anything can happen when you’re gaming on the go. With 6 types of protection²⁻⁹, the P9 Express can handle it all—helping maintain your game progress.
- NEXT-GEN AND BACKWARD COMPATIBLE: Your microSD Express card is compatible with Nintendo Switch 2¹⁰ and microSD UHS-I¹¹ devices, including tablets, drones, cameras and more.
Can you reuse your old Switch card?
A conventional microSD card from the original Switch cannot store or load games or save data on Switch 2. You can, however, import screenshots and captured videos from that card into Switch 2 system memory. If you want the old card to provide expandable game storage, it does not meet the requirement; choose microSD Express instead.
An Express card can be used in the original Switch too. Nintendo says its read/write speed on that console is equivalent to a conventional microSD card, so buying Express does not create an equivalent speed upgrade for the older system. Nintendo’s guidance on using Express cards with Nintendo Switch covers that cross-generation use.
The Tool Desk
Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Rank #3
- ELEVATE YOUR GAMING: Engineered with next-generation PCIe Gen 3x1 microSD Express technology to achieve blazing fast performance up to 890MB/s Read and up to 810MB/s Write speeds.²
- LIGHTNING FAST DOWNLOADS: Experience extreme performance up to 4.4x faster than standard UHS-I microSD cards, to spend less time waiting and more time playing! More than double your gaming device’s internal storage with up to 512GB of expanded AAA game space.¹,²
- READY FOR NEXT-GEN GAMING: Compatible with microSD Express Host Devices, including Nintendo Switch 2, and backwards compatible with microSD UHS-I and UHS-II devices like portable gaming devices and more!⁴
- STAY COOL UNDER PRESSURE: Engineered to maximize cooling efficiencies with a heat dissipation dissipative design and adaptive thermal technology.³
- A1 APP PERFORMANCE: A1 Application Performance rating allows users to run gaming apps directly from the microSD card when gaming and delivers faster app launch and performance.
Choosing a card and setting it up
Check the format and capacity
Look for a card specifically marked microSD Express and confirm its capacity is no more than Nintendo’s supported 2 TB maximum. A conventional microSD or UHS-I card is not a substitute, regardless of its U1/U3 rating or advertised speed. Nintendo says any card meeting the microSD Express standard within the supported capacity can be used.
Nintendo Japan lists licensed SanDisk and Samsung microSD Express examples, including 256 GB cards and a 512 GB SanDisk card. Those are named examples, not a performance ranking; check the exact model and current availability on Nintendo Japan’s accessories page.
Rank #4
- NEXT GEN GAMING: Works with Nintendo Switch 2.
- READY FOR TOMORROW. Ready for future products with a PCIe-NVMe interface; performs at UHS-I speeds with microSD UHS-I and UHS-II devices.
- EXPONENTIALLY FASTER PERFORMANCE. Up to 4.4 times faster transfer speeds than our fastest microSD UHS-I cards [9]. Transfer a 2-hour HD movie in less than 3.5 seconds [1]; save up to 2.8 minutes transferring 60 minutes of 4K UHD video [4] shot at 30 fps when paired with the SanDisk PRO-READER SD Express Dual Card (sold separately) [9]
- DURABILITY YOU CAN COUNT ON: Cards are waterproof, temperature-proof, humidity-proof, drop-proof, shock-proof, magnetic-proof, x-ray proof, and wear-out proof [5].
- HEAT MANAGEMENT REIMAGINED. SanDisk ThermAdapt helps keep devices from overheating with a specially designed enclosure and controller that uses dynamic adaptive thermal management.
Prepare for first use and future replacement
- Insert the microSD Express card into Switch 2.
- For the card’s first use in that console, connect to the internet and install the required system update.
- Use one Express card where possible. Nintendo recommends a single card; if you replace it with a larger one, copy the data across. Software downloaded across multiple cards cannot later be combined onto one card.
The update and card-management requirements are set out in Nintendo’s microSD Express FAQ.
Quick Recap
Best Value
- Ultra-Fast Read Speeds — Experience read speeds up to 900 MB/s and write speeds up to 620 MB/s, delivering rapid file transfers and smooth performance for gaming, photography, and 4K video recording.
- Optimized for Gaming & Devices – Tested with Switch 2 and compatible with laptops, tablets, cameras, and Android devices that support microSD Express or UHS-I. Ideal for expanding storage without lag.
- 4K Video & High-Resolution Support – Capture and store 4K UHD videos and high-res photos seamlessly thanks to Class 10, U3, V30, and A2 performance ratings.
- Reliable & Durable Design – Built for long-term use with shockproof, temperature-resistant, waterproof, and X-ray-resistant protection, keeping your data safe wherever you go.
- Multiple Capacity Options – Available in 256GB, 512GB and 1TB options to suit your storage needs. Note that actual usable storage may be slightly less due to system formatting and a portion reserved for card management functions, which is a standard industry practice to ensure optimal performance and reliability.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Do these 3 things before closing this tab:
1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitches
