SanDisk

SanDisk SDSQXBZ-256G-ANCMA Extreme Plus 256GB microSDXC Card

4.5 (53 reviews)
4KUHD

The SanDisk Extreme Plus 256GB microSDXC delivers up to 170MB/s reads and A2 app performance for 4K video and demanding mobile use.

$69.49*
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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

The SanDisk Extreme Plus 256GB microSDXC card is built for users who need reliable, high-speed storage in compact devices. With sequential read speeds up to 170MB/s and write speeds up to 90MB/s, it handles the demands of 4K UHD video recording, rapid burst photography, and large file transfers with ease. The V30 and U3 speed class ratings guarantee a minimum 30MB/s sustained write speed — the baseline for smooth 4K capture — making it a dependable choice for action cameras, drones, and mirrorless cameras that accept microSD media. The A2 Application Performance Class rating goes further by optimizing random read and write operations, which translates to faster app loading and smoother performance when running applications directly from the card on Android smartphones and tablets.

At 256GB, the card provides ample room for hours of 4K footage, thousands of high-resolution images, or a substantial library of apps and media. SanDisk's Extreme Plus line is designed with durability in mind, offering resistance to water, shock, temperature extremes, and X-rays. The included full-size SD adapter extends compatibility to laptops, DSLR cameras, and desktop card readers, making it easy to offload files without additional accessories. For anyone working with demanding media formats across multiple devices, this card strikes a strong balance between capacity, speed, and versatility.

Key Features

Allows 4K UHD video, full-HD video and high-resolution photos

A2-rated to enable speedy app performance

Stores up to 256GB

Specifications

Capacity
256GB
Form Factor
microSDXC
Speed Class
UHS-I, U3, V30, A2
Max Read Speed
Up to 170MB/s
Max Write Speed
Up to 90MB/s
Adapter Included
Yes (full-size SD)
Model
SDSQXBZ-256G-ANCMA

Pros & Cons

👍 Pros

  • Read speeds up to 170MB/s make transferring large video files and photo libraries noticeably faster than standard microSD cards
  • A2 app performance rating supports running and loading apps directly from the card on compatible Android devices
  • 256GB capacity holds extensive 4K video footage, high-resolution photos, or a large app and media library
  • V30 and U3 speed class ratings ensure reliable sustained writes for uninterrupted 4K recording

👎 Cons

  • Write speed of up to 90MB/s is considerably slower than the read speed, which can be a bottleneck during burst photo shooting
  • Requires a UHS-I compatible reader or device to achieve maximum transfer speeds; older readers will be much slower
  • No built-in encryption or hardware write protection switch on the microSD form factor

Frequently Asked Questions

It is compatible with Android smartphones, tablets, action cameras like GoPro, drones, and any device that accepts microSDXC cards. An SD adapter is included for use in full-size SD card slots.
U3 and V30 both indicate a minimum sustained write speed of 30MB/s, which is the threshold for recording 4K UHD video. A2 indicates the card meets Application Performance Class 2 standards, supporting faster random read/write operations for running apps directly from the card.
It offers read speeds up to 170MB/s and write speeds up to 90MB/s, allowing you to move large photo and video files to a computer quickly when paired with a compatible UHS-I reader.
Yes, the V30 speed class rating guarantees the minimum 30MB/s sustained write speed required for 4K UHD video recording in compatible cameras and drones.
Yes, a full-size SD adapter is included so you can use the microSDXC card in cameras, laptops, and card readers with standard SD slots.