Here's where you can buy microSD Express cards for the Switch 2
Briefly

The Nintendo Switch 2 requires microSD Express cards for optimal functionality, providing a significant speed upgrade over older models. Existing microSD cards from previous Switch models are limited to viewing screenshots and videos only. With an impressive throughput of 4.4 times faster than older cards, microSD Express cards are more expensive, with some reaching up to $200 for 1TB. Walmart's Onn brand offers competitive pricing at $65.88 for a 512GB model. The device's built-in 256GB storage means immediate expansion might not be necessary upon launch.
All microSD cards look pretty much the same, but when it comes to buying the right one for your Nintendo Switch 2, only microSD Express cards will work for storing and playing games.
Nintendo opted for a significantly faster spec in its new handheld console, which boasts an advertised 4.4x improvement in terms of transfer speeds over microSD cards you might already have.
Walmart's Onn label is a beacon of light, as its microSD Express cards are significantly cheaper than the competition, with its 512GB model costing $65.88 when it's in stock.
Thankfully, since the Switch 2 has 256GB of built-in storage, you most likely won't need a microSD Express card immediately upon receiving your console.
Read at The Verge
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