Walmart has quietly positioned itself as the go-to retailer for Nintendo Switch 2 storage, listing the Onn 512GB MicroSD Express card at $84.77 with free shipping. An unadvertised coupon code, SAVE3X, shaves an additional $10 off at checkout, bringing the effective price down to $74.77. The 256GB variant follows the same pattern, dropping from $46.77 to $36.77 with the code applied. For anyone who secured a Switch 2 preorder or plans to pick one up at launch, this is the most affordable entry point into the new storage format so far.
The coupon comes with strings attached, though many buyers report success beyond the official terms. Walmart lists the code as valid only for new customers on their first three online pickup or delivery orders, with a $35 minimum spend. In practice, the discount appears to work for a significant number of returning customers as well. Your mileage may vary, but the volume of confirmed redemptions suggests it is worth attempting at checkout before looking elsewhere.
Nintendo's Switch 2 console ships with only 256GB of internal storage, a capacity that fills rapidly given the file sizes of modern releases. The system requires MicroSD Express cards — standard MicroSD cards from the original Switch are not compatible, despite looking physically similar. The Onn cards are budget-friendly options that carry the Express specification needed for the new hardware.
The Onn 512GB model delivers rated speeds of 800MB/s write and 600MB/s read, a substantial leap over the previous generation's UHS-I cards that typically topped out around 100MB/s. That bandwidth matters for a console that streams assets directly from storage during gameplay. Faster write speeds also mean shorter install times when downloading games from the eShop, a practical benefit every time you add a new title.
- Onn 512GB MicroSD Express Memory Card: $84.77 ($74.77 with SAVE3X)
- Onn 256GB MicroSD Express Memory Card: $46.77 ($36.77 with SAVE3X)
- Coupon code: SAVE3X (unadvertised, $10 off either capacity)
- Coupon terms: First three online pickup/delivery orders, new customers preferred, $35 minimum
- Free shipping on both cards
- MicroSD Express required — standard MicroSD cards do not work on Switch 2
- Rated speeds: 800MB/s write, 600MB/s read
The Switch 2's 256GB of onboard storage sounds reasonable on paper until you look at the actual install sizes of flagship titles. Final Fantasy 14 demands 117GB alone — nearly half the internal drive. Final Fantasy VII Remake Intergrade claims 90GB, Split Fiction requires 70GB, Cyberpunk 2077 needs 60GB, and Hyrule Warriors: Age of Imprisonment takes 44GB. Downloading just three of these games exhausts the internal storage before accounting for system files, saves, screenshots, or future updates.
This creates an immediate, unavoidable need for expanded storage at launch. The Onn cards solve that problem at a price significantly below competing brands. The coupon widens the gap further. For early adopters, the 512GB card at $74.77 represents a compelling value for a card that will likely remain in the console for its entire lifespan.
Nintendo also recently opened preorders for the Legend of Zelda 40th Anniversary Edition Switch 2 console, shipping October 29, and The Legend of Zelda: Ocarina of Time, releasing November 5. Both arrivals will drive a wave of new console activations, and each of those owners will face the same storage ceiling within weeks. Securing a card now avoids the potential stock constraints and price spikes that typically follow a major hardware launch.
Key Takeaways
- Walmart exclusively sells Onn 512GB MicroSD Express card for $84.77 ($74.77 with SAVE3X)
- 256GB model costs $46.77 ($36.77 with coupon)
- Switch 2 requires MicroSD Express — old MicroSD cards are incompatible
- Major Switch 2 games range from 44GB to 117GB, filling 256GB internal storage quickly
The Bad Gamer Take
Walmart’s $75 deal on the Onn 512GB MicroSD Express card will make Switch 2 owners finally feel like they’re getting the value they crave because the 800 MB/s write speed dramatically shrinks download times. Expect Nintendo to consider bundling these cards in future software releases, as the faster storage unlocks new gameplay possibilities, and you’ll see how the ecosystem evolves. WATCH how Nintendo’s official support for the Onn brand expands across upcoming titles.
The Onn cards are not the fastest Express models on the market, but they meet Nintendo's spec and undercut the competition by a wide margin. For most players, the real-world difference between 800MB/s and the 900MB/s+ of premium cards will be negligible — load times are largely bounded by the console's decompression pipeline and CPU, not raw storage throughput. At this price, the value proposition is difficult to argue against. If you are buying a Switch 2, budgeting for one of these cards should be treated as mandatory, not optional.
Sources
When Eric isn't hunting for deals for other people at work, he's hunting for deals for himself during his free time.
Frequently asked questions
How much does the 512GB Nintendo Switch 2 memory card cost at Walmart with the coupon?
The Onn 512GB MicroSD Express Memory Card is $84.77 and with the SAVE3X coupon it drops to $74.77.
How much does the 256GB Nintendo Switch 2 memory card cost at Walmart with the coupon?
The Onn 256GB MicroSD Express Memory Card is $46.77 and with the SAVE3X coupon it drops to $36.77.
What is the coupon code for the Walmart memory card deal?
The coupon code is SAVE3X.
What are the read and write speeds of the Onn 512GB MicroSD Express Memory Card?
The Onn model boasts speeds of 800MB/s write and 600MB/s read.
How much storage does the Nintendo Switch 2 come with onboard?
The Switch 2 only comes with 256GB of onboard storage.
