SanDisk Extreme UHS-I U3 256GB SD Card — main product image

SanDisk

SanDisk Extreme UHS-I U3 256GB SD Card

Name: SanDisk Extreme UHS-I U3 256GB SD Card
Brand: SanDisk
SKU: Extreme UHS-I U3 SD

★★★★★4.4 (72 reviews)

Shoot fast-action photos and 4K video with 256GB of high-speed storage rated at 150MB/s read.

$41.97*

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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 256GB SDXC UHS-I U3 Memory Card is built for photographers and videographers who need a dependable, high-capacity card that can keep up with demanding workflows. With read speeds reaching up to 150MB/s, transferring large files to your computer is fast and efficient, saving valuable time during post-production. The maximum write speed of 60MB/s, combined with a guaranteed minimum of 30MB/s via the V30 rating, ensures smooth and uninterrupted recording of 4K Ultra HD video — making this card well-suited for mirrorless cameras, DSLRs, and camcorders.

At 256GB, this card offers substantial room for extended shoots without the need to swap media. The UHS Speed Class 3 (U3) and Class 10 ratings confirm its ability to handle sustained high-speed data capture, whether you're shooting continuous bursts of RAW photos or recording lengthy video clips. Packaged in a protective jewel case and covered by SanDisk's Lifetime Limited warranty, the Extreme 256GB delivers the kind of reliability and capacity that makes it a practical choice for travel, events, and everyday creative work.

Key Features

SanDisk Extreme 256GB UHS-I Class 10 U3 V30 SDXC Memory Card - Jewel Case - SanDisk Lifetime Limited

Capacity: 256GB

Read Speed: Up to 150 MB/s

Write Speed: 60 MB/s Maximum / 30 MB/s Minimum

Form Factor: SDXC

Specifications

Brand

SanDisk

Model

Extreme UHS-I U3 SD

Capacity

256GB

Form Factor

SDXC

Interface

UHS-I

Read Speed

Up to 150 MB/s

Write Speed

Up to 60 MB/s (30 MB/s minimum)

Speed Class

Class 10

UHS Speed Class

Video Speed Class

V30

4K UHD Support

Yes

Warranty

SanDisk Lifetime Limited

Pros & Cons

👍 Pros

256GB capacity stores thousands of high-resolution photos or hours of 4K video
150MB/s read speed allows fast file transfers to a computer
U3 and V30 ratings guarantee sustained write performance for uninterrupted 4K recording
Comes in a jewel case for organized storage and protection
Backed by SanDisk Lifetime Limited warranty

👎 Cons

Maximum write speed of 60MB/s is slower than SanDisk's Extreme Pro line
UHS-I interface limits bus speed compared to UHS-II cards
Does not include a card reader for direct USB transfer
Not a micro SD form factor so it won't fit action cameras or smartphones without an adapter

Frequently Asked Questions

What devices is the SanDisk Extreme 256GB SD card compatible with?

This is a full-size SDXC card compatible with cameras, camcorders, laptops, and other devices with an SD card slot that support the SDXC format.

Can the SanDisk Extreme 256GB handle 4K video recording?

Yes, it carries a V30 (Video Speed Class 30) rating, which guarantees a minimum sustained write speed of 30MB/s — the threshold required for 4K Ultra HD video capture.

What is the difference between the SanDisk Extreme and the Extreme Pro SD cards?

The Extreme offers read speeds up to 150MB/s and write speeds up to 60MB/s, while the Extreme Pro typically delivers faster speeds. The Extreme line provides strong performance at a more accessible price point.

Does this card come with any warranty?

Yes, the SanDisk Extreme 256GB SD card is backed by a SanDisk Lifetime Limited warranty.

What speed class ratings does this card carry?

It is rated UHS-I, U3 (UHS Speed Class 3), V30 (Video Speed Class 30), and Class 10, ensuring reliable performance for both photography and video recording.