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Small rectangular microSD Express card with metallic contacts and SanDisk branding

SanDisk

SanDisk SDSQXFN-256G-GN4NN 256GB microSD Express memory card

SKU CH-ATEN-0V2PM MPN SDSQXFN-256G-GN4NN

A 256GB microSD Express card delivering 880MB/s read and 650MB/s write speeds for Nintendo Switch 2

  • Card typeMicro SD
  • TypemicroSDXC
  • Capacity256GB
  • Speed Class RatingMicroSD Express
  • Read Speed880mb/s
  • Write Speed650mb/s

Capacity 256GB

Struck-through versions exist but are not stocked here.

  • Up to 880MB/s read speed loads games fast
  • Up to 650MB/s write speed captures footage quickly
  • 210MB/s sustained write keeps recording steady
  • microSD Express design works with Nintendo Switch 2
  • 256GB capacity stores large libraries

256GB microSD Express Card

This SanDisk microSDXC card delivers 256GB of storage using the microSD Express interface. It is built for devices that support the faster PCIe-based protocol, such as the Nintendo Switch 2. The card carries U3 and C10 ratings for consistent performance. It suits players and creators who need quick access to large game files or high-bitrate video.

Gamers needing fast portable storage

This card targets Nintendo Switch 2 owners and users of other microSD Express hosts who want reduced load times and rapid file transfers. Buyers whose devices only support UHS-I or UHS-II speeds will not see the advertised throughput and should choose a standard microSD card instead. It is not for anyone requiring capacities beyond 256GB.

880MB/s maximum read speed

The headline specification is a read speed of up to 880MB/s, with write speeds up to 650MB/s and a sustained write of 210MB/s. This bandwidth determines whether the card can feed data quickly enough for demanding titles or continuous recording. Verify that your host device supports microSD Express before purchase.

Highlights

  • Up to 880MB/s read speed loads games fast
  • Up to 650MB/s write speed captures footage quickly
  • 210MB/s sustained write keeps recording steady
  • microSD Express design works with Nintendo Switch 2
  • 256GB capacity stores large libraries

Specifications

BrandSanDisk
Card typeMicro SD
SeriesMicro SD Express
ModelSDSQXFN-256G-GN4NN
Part NumberSDSQXFN-256G-GN4NN
TypemicroSDXC
Capacity256GB
Speed Class RatingMicroSD Express
Read Speed880mb/s
Write Speed650mb/s
Shipping weight0.02 kg
Package size127 × 102 × 13 mm

Other versions of this model

1 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Does the 256GB microSD Express card fit the Nintendo Switch 2 microSD slot?

Yes, the card is a microSDXC form factor and the supplier title confirms it works with the Nintendo Switch 2 slot.

What is the correct way to insert the card so the PCIe interface engages?

Align the gold contacts facing down and push the card straight into the slot until it clicks; do not force it at an angle or the PCIe pins may not seat properly.

Will the 210MB/s sustained write speed remain consistent over the life of the card?

Sustained write performance of 210MB/s is maintained by the MicroSD Express controller and NAND, though heavy write cycles can gradually reduce peak speeds over time.

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