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The Onn microSD Express cards reported at $85 for 512GB and $47 for 256GB offer two lower-cost Switch 2 storage options—but those are reported Walmart prices, not confirmed live deals or proof they are the cheapest available. The key requirement is the format: Switch 2 supports microSD Express for expanded game and save-data storage, not conventional microSD cards.
What Switch 2 storage cards can you use?
Nintendo says, “Nintendo Switch 2 is only compatible with microSD Express cards.” That requirement applies to using a card for game and save-data storage. A conventional microSD card—even one that worked with the original Switch—cannot be used for that purpose on Switch 2. Check the packaging for the words microSD Express before buying.
Nintendo lists 256GB of internal storage and supports microSD Express cards up to 2TB. The 2TB figure is the console’s compatibility limit, not a statement that every capacity is readily available to buy. Nintendo’s Switch 2 product information and Nintendo Support’s card compatibility guidance describe the storage specifications.
What are the reported Onn card prices?
Yahoo Tech’s Jeff Dunn reported Walmart prices of $85 for the Onn 512GB microSD Express card when in stock and $47 for the 256GB model. These are reported price points, not verified current listings; stock and prices can change, and the available evidence does not establish that either is the lowest price on the market. See Yahoo Tech’s microSD Express card guide for the report.
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- Nintendo Switch 2 uses a new standard of expandable memory card called microSD Express (sold separately). This kind of memory card is needed for faster access speeds and to ensure games will run smoothly.
- Please note: Nintendo Switch 2 is only compatible with microSD Express cards. If the microSD cards you have used for Nintendo Switch do not support microSD Express standards, you cannot use them with Nintendo Switch 2.
The 512GB version gives you twice the listed capacity of the 256GB model, while the smaller card is the lower upfront-cost option. Which makes more sense depends on how much room you want beyond the console’s 256GB internal storage and the price you can confirm at checkout.
How does the Onn card compare with other Switch 2 options?
Onn is Walmart’s in-house brand, and Yahoo Tech describes the card as a rebadged product. In its testing, the publication found it somewhat slower than some alternatives, while describing the performance gap as generally small in the tested contexts. That is Yahoo Tech’s test result, not an independent benchmark here; the guide also reports a one-year warranty.
Rank #2
- 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.
Other microSD Express options named in product coverage include Samsung, PNY, SanDisk, GameStop, and Lexar. Their capacities and prices vary, and roundup prices should not be treated as live offers. SanDisk’s data sheet confirms a 512GB microSD Express product compatible with Nintendo Switch 2; see SanDisk’s product data sheet. A separate GameSpot roundup of microSD Express cards lists several brand and capacity alternatives, but its prices are not a live price comparison.
Quick Recap
Best Value
- 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.
Rank #4
- The perfect card for the Nintendo Switch 2 delivers revolutionary performance that is 4x faster than typical UHS-I microSD cards
- PCIe technology delivers read speeds up to 900MB/s so the game loads faster
- Write speed up to 600MB/s deliver accelerated download speeds when paired with the Lexar microSD Express card reader
- Level-up your handheld gaming experience with next-gen tech
- 1TB microSD Express card offers more space for your favorite games
Rank #3
- 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.
| Option | Capacity | Reported price or detail | What to verify |
|---|---|---|---|
| Onn microSD Express | 512GB | $85 reported by Yahoo Tech for Walmart when in stock; one-year warranty reported | Current Walmart price, stock, and warranty terms |
| Onn microSD Express | 256GB | $47 reported by Yahoo Tech for Walmart | Current Walmart price and stock |
| SanDisk microSD Express | 512GB | Capacity and Switch 2 compatibility confirmed by SanDisk; price not stated in its data sheet | Current retailer price and availability |
| Samsung, PNY, GameStop, and Lexar microSD Express options | Varies | Named in product coverage; prices and capacities vary | Exact model, capacity, current price, and availability |
What to check before buying
- Format: Choose a card explicitly labeled microSD Express; ordinary microSD is not a substitute for Switch 2 game and save-data storage.
- Capacity and price: Compare the amount of extra space you want with the retailer’s current checkout price, rather than relying on an older reported price.
- Warranty and performance claims: Check the terms for the exact model. Treat performance comparisons as specific to the publication’s test conditions, not a guarantee of identical results for every game or setup.
- Compatibility and availability: Confirm the product is a microSD Express card and that the capacity is within Nintendo’s stated limit; compatibility does not guarantee a particular card is currently in stock.
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.
