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Small red microSDXC card with full-size SD adapter

SanDisk

SanDisk Extreme 256GB microSDXC UHS-I U3 A2 V30 190MB/s SDSQXAV-256G-GN6MA memory card

SKU CH-2245-AV0VF MPN SDSQXAV-256G-GN6MA

256 GB microSDXC card with up to 190 MB/s read and 130 MB/s write speeds for 4K UHD video and A2 app performance

  • Total capacity256 GB
  • Speed classUHS-I / U3 / Class 10 / A2 / V30
  • Max read speed190 MB/s
  • Write throughput130 MB/s
  • Product typeMicroSDXC
  • Key featuresUp to 190 MB/s read speed, up to 130 MB/s write [256 GB-1 TB

Capacity 256GB

  • Fast 190MB/s read speeds for quick media transfers
  • 130MB/s write speeds enable rapid burst shooting
  • U3 V30 A2 ratings guarantee smooth 4K UHD video capture
  • Shock water temperature and X-ray proof design protects data
  • SanDisk Memory Zone app simplifies file management on device

SanDisk Extreme 256GB microSDXC UHS-I U3 A2 V30

The SanDisk Extreme 256GB microSDXC card targets creators who need reliable 4K UHD and Full HD video capture. It carries U3, V30, A2 and Class 10 ratings for sustained write performance. The 256GB capacity suits extended shooting sessions. Buyers who need capacities beyond 1TB should look elsewhere.

Installation and common pitfalls

Insert the card into a compatible microSDXC slot or use the included full-size SD adapter for standard readers. To reach the advertised 190MB/s read speed, pair it with the SanDisk Professional PRO-READER SD and microSD over a USB 3.0 port. Low-quality readers or older USB ports often throttle throughput well below rated speeds. QuickFlow Technology helps streamline file transfers when used with supported software.

Deciding specification — UHS-I U3 V30 A2 speed class

The UHS-I U3 V30 A2 rating guarantees a minimum 30MB/s sequential write and the A2 app performance tier for faster app loading on supported devices. This combination determines whether the card can sustain 4K UHD recording without dropped frames. If your workflow demands sustained write speeds above 130MB/s or a different bus interface, this card will not meet the requirement.

How it compares

Measured against everything we stock in SD & MicroSD Memory Cards, at today’s prices. Recalculated every night.

Price $44.99
Typical for this category: the median of 1,947 items is $46.99.
Total capacity 256 GB
Higher than about 80% of the 1,132 comparable items (median 64 GB).
Price per TB $175.74 per TB
Cheaper than about 86% of the 901 comparable items (median $374.69 per TB).

Specifications

Product
Brand nameSanDisk
Product lineExtreme
Model nameSDSQXAV-256G-GN6MA
Total capacity256 GB
Product typeMicroSDXC
Performance
Speed classUHS-I / U3 / Class 10 / A2 / V30
Max read speed190 MB/s
Write throughput130 MB/s
Size & build
Shipping weight0.01 kg
Package size157 × 104 × 8 mm

Other versions of this model

5 more in the same range

Questions about this item

How can I verify the 190MB/s read and 130MB/s write speeds after setup?

Use a USB 3.0 card reader and benchmark software to measure sequential read and write performance; avoid low-quality readers that can bottleneck the card.

What comes in the box and what must I purchase separately?

The package includes the 256GB microSDXC card and a full-size SD adapter; the SanDisk Professional PRO-READER is sold separately for maximum transfer rates.

Which capacity and speed class should I choose for 4K UHD recording?

This 256GB model carries U3, V30 and A2 ratings, delivering up to 130MB/s write speed — suitable for sustained 4K UHD and Full HD video capture.

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