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Small rectangular microSD card with gold contacts and red label, shown with full-size SD adapter

SanDisk

SanDisk SDSQXFN-256G-GN4NN 256GB microSD Express Card

SKU CH-550G-DTFA3

256 GB microSD Express card reaching 880 MB/s read and 650 MB/s write with U3, C10 and A1 ratings

  • Card typeMicro SDXC
  • TypemicroSDXC
  • Capacity256GB
  • Speed Class RatingUHS-I, U3, C10, A1
  • Read SpeedUp to 880MB/s
  • Write SpeedUp to 650MB/s
  • 256 GB capacity stores more games and media
  • Up to 880 MB/s read speed loads data quickly
  • Up to 650 MB/s write speed saves large files fast
  • 210 MB/s sustained write supports 4K video recording
  • Waterproof, shock-proof and temperature-proof for tough conditions

256GB microSD Express card for gaming consoles

This 256GB microSDXC Express card targets Nintendo Switch 2 owners and creators who need faster storage for games and 4K video. It carries U3, C10 and A1 ratings for sustained performance in compatible devices.

Bundled adapter enables full-size SD slots

The included microSD-to-SD adapter lets the card work in standard SD readers and cameras. Without an SD Express reader the card falls back to UHS-I speeds, so the adapter alone does not unlock the higher transfer rates.

PCIe-NVMe interface requires host support

Maximum read and write speeds of 880MB/s and 650MB/s only appear with devices that implement the PCIe-NVMe interface. In UHS-I or UHS-II hosts the card operates at lower UHS-I speeds, limiting transfer performance.

Pontos fortes

  • 256 GB capacity stores more games and media
  • Up to 880 MB/s read speed loads data quickly
  • Up to 650 MB/s write speed saves large files fast
  • 210 MB/s sustained write supports 4K video recording
  • Waterproof, shock-proof and temperature-proof for tough conditions

Especificações

BrandSanDisk
Card typeMicro SDXC
SeriesExpress
ModelSDSQXFN-256G-GN4NN
Part NumberSDSQXFN-256G-GN4NN
TypemicroSDXC
Capacity256GB
Speed Class RatingUHS-I, U3, C10, A1
Read SpeedUp to 880MB/s
Write SpeedUp to 650MB/s

Perguntas sobre este artigo

Does the 256GB microSD Express card need any maintenance or replacement after extended use?

The card is rated as wear-out proof, so no routine maintenance or scheduled replacement is required under normal operation.

What is the first limit reached during sustained write workloads?

Sustained write speed is specified at 210MB/s, which becomes the bottleneck before the peak 650MB/s figure.

How much heat or power does the card generate when running all day?

SanDisk ThermAdapt uses a specially designed enclosure and controller with dynamic adaptive thermal management to keep devices from overheating during continuous operation.

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