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Small red and black microSD card with SanDisk Extreme branding

SanDisk

SanDisk Extreme 256 GB microSD 160/90 MB/s U3 A2

SKU CH-B6EM-T438S

A 256 GB microSD card rated U3 and A2 with 160 MB/s read and 90 MB/s write speeds for 4K video and fast app performance

  • TypeMicroSD
  • FeaturesSold as 1 Each.
  • Reads up to 160 MB/s for quick file offloads
  • Writes up to 90 MB/s for smooth 4K UHD video capture
  • A2 rating accelerates app launch and in-app responsiveness
  • Class 10 UHS-I U3 guarantees sustained performance for action cameras
  • 256 GB capacity stores hours of high-resolution footage

Capacity and Speed Rating

This SanDisk Extreme microSDXC card provides 256 GB of storage with UHS-I U3 and Class 10 ratings. It delivers sequential read speeds up to 160 MB/s and write speeds up to 90 MB/s. The A2 application performance class ensures fast app loading on compatible Android smartphones. It is built for 4K UHD video recording and high-resolution photo capture.

Durability and Daily Handling

The card is designed to withstand harsh conditions typically faced by action cameras and drones. Its robust construction protects data during outdoor activities and frequent device swaps. The microSD form factor fits directly into smartphones, action cameras, and drone controllers without adapters. Fast transfer rates reduce the time needed to offload large video files to a computer.

Compatibility Check Before Purchase

Verify that your device supports the microSDXC standard and UHS-I speeds to achieve the rated performance. Confirm the host accepts A2-rated cards for the stated application performance benefits. Ensure the maximum supported capacity meets or exceeds 256 GB. Devices limited to microSDHC or lower speed classes will not utilise the full capabilities of this card.

Highlights

  • Reads up to 160 MB/s for quick file offloads
  • Writes up to 90 MB/s for smooth 4K UHD video capture
  • A2 rating accelerates app launch and in-app responsiveness
  • Class 10 UHS-I U3 guarantees sustained performance for action cameras
  • 256 GB capacity stores hours of high-resolution footage

Specifications

BrandSanDisk
TypeMicroSD
FeaturesSold as 1 Each.

Questions about this item

What UHS-I speed class does this microSD card meet, and what does it mean for 4K recording?

The card meets the U3 speed class, so it can sustain the write speeds required for 4K UHD video without dropped frames.

What physical size and format does this card use, and will it fit my action camera or drone?

It is a microSDXC card in the standard microSD form factor, compatible with any device that accepts microSDXC media.

How do I install the card and enable the A2 app-performance rating on my Android phone?

Insert the card, then format it as internal storage in Android settings so the system can use the A2-rated speeds for installed apps.

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