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Small rectangular microSD card, red and grey front, gold contacts visible

SanDisk

SanDisk Ultra SDSQUAR-256G-GN6MN 256GB microSDXC memory card

SKU CH-J3XE-FNMXF MPN SDSQUAR-256G-GN6MN

Stores 256 GB of photos, videos and apps with up to 100 MB/s read speed and A1-rated app performance

  • Total capacity256 GB
  • Memory card formatMicroSD
  • Speed classA1 / U1
  • Max read speedTransfer speeds of up to 100 MB/s
  • Product typeMicroSDXC
  • Key featuresMore Storage space for videos, photos, music, movies and oth
  • 256GB capacity stores thousands of photos and videos
  • Read speeds up to 100MB/s transfer files quickly
  • A1 rating accelerates app launch on smartphones
  • Class 10 U1 supports Full HD video recording
  • Compatible with Android phones and tablets

256GB microSDXC card

The SanDisk Ultra SDSQUAR-256G-GN6MN is a 256GB microSDXC memory card rated A1 and U1. It delivers transfer speeds of up to 100MB/s and carries a Class 10 speed rating. The card is designed to expand storage for Android smartphones and tablets. It provides space for videos, photos, music, movies and other files.

Smartphone users needing app performance

The A1 rating means the card is optimised for apps, giving faster launch times and smoother performance on Android devices. Class 10 supports Full HD video recording and high-quality photos. Users who need to capture 4K video or require sustained write speeds above the U1 rating should look at higher-specification cards. The microSD form factor will not fit devices that only accept full-size SD cards.

256GB capacity with 100MB/s read headroom

The 256GB capacity holds large media libraries and lets you move up to 1000 photos in a minute at the rated read speed. It comfortably handles Full HD video capture and everyday app workloads on supported Android hardware. Write-intensive tasks such as high-bitrate 4K recording will exceed the U1 minimum sustained write performance. The card has been available since 2021.

How it compares

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

Price $57.99
Pricier than about 56% of the 1,947 comparable items (median $46.99).
Total capacity 256 GB
Higher than about 80% of the 1,132 comparable items (median 64 GB).
Price per TB $226.52 per TB
Cheaper than about 75% of the 901 comparable items (median $374.69 per TB).

Specifications

Product
Brand nameSanDisk
Product lineUltra
Model nameSDSQUAR-256G-GN6MN
Total capacity256 GB
Product typeMicroSDXC
Performance
Speed classA1 / U1
Max read speedTransfer speeds of up to 100 MB/s
Storage
Memory card formatMicroSD

Questions about this item

Does my phone need a microSDXC slot to use this 256GB card?

Yes, the host device must support the microSDXC standard to address the full 256GB capacity.

Will this card record Full HD video on a camera that only accepts Class 10 media?

The card carries a Class 10 rating, so it meets the minimum sustained write speed required for Full HD recording on older cameras.

How can I confirm the card is delivering its rated 100MB/s read speed after I install it?

Run a benchmark tool such as CrystalDiskMark or the SanDisk Memory Zone app and verify sequential read results approaching 100MB/s.

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