SanDisk

SanDisk 256G_SD_Extreme_Pro_R6 256GB SD Card Reader Combo

4.7 (50 reviews)
4KUHD

Capture and transfer 4K UHD content at up to 170MB/s with this 256GB Extreme Pro SD card and reader bundle.

$54.91*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The SanDisk 256GB Extreme Pro SDXC card is built for photographers and videographers who require both high capacity and fast performance in a full-size SD format. With read speeds reaching up to 170MB/s and write speeds up to 90MB/s, it handles the demands of continuous 4K UHD video recording and rapid-fire photo bursts. The V30 and U3 speed class ratings provide a guaranteed minimum sustained write speed of 30MB/s, ensuring that recording is not interrupted by buffer slowdowns. With 256GB of storage, the card holds substantial amounts of footage or thousands of high-resolution images before requiring offload.

The card is engineered to withstand harsh shooting conditions, with rated protection against water, extreme temperatures, physical shock, and airport X-ray machines — a practical consideration for travel and outdoor photography. This bundle also includes an Everything But Stromboli Combo Card Reader, providing an out-of-the-box solution for transferring files to a computer without needing to source a separate reader. The card is noted as compatible with Sony Alpha a7 series mirrorless cameras, though it works with any device that accepts full-size SDXC cards with UHS-I support.

Key Features

Bundle includes (1) SD Extreme Pro memory card and (1) Everything But Stromboli (TM) Combo Card Reader.

The card of choice for professionals who need efficiency and speed in post-production

Compatible with Sony Alpha a7 III, a7 II, a7, a7s, a7s II Mirrorless Cameras

Can read speeds of up to 170MB/s speed. Write speeds of up to 90MB/s

UHS speed Class 3 (U3) and video speed Class 30 (V30) for 4K UHD video

Specifications

Brand
SanDisk
Model
256G_SD_Extreme_Pro_R6
Capacity
256GB
Card Type
SDXC
UHS Standard
UHS-I
Speed Class
U3, V30
Read Speed
Up to 170MB/s
Write Speed
Up to 90MB/s
Durability
Waterproof, Temperature Proof, Shockproof, X-ray Proof
Bundle Includes
Everything But Stromboli Combo Card Reader

Pros & Cons

👍 Pros

  • 256GB capacity provides ample storage for large photo libraries and extended 4K video sessions
  • 170MB/s read speed significantly accelerates file transfers during post-production workflows
  • V30 and U3 speed ratings ensure reliable sustained writes for uninterrupted 4K recording
  • Waterproof, shockproof, temperature proof, and X-ray proof construction protects data in harsh conditions
  • Bundled card reader adds immediate transfer capability without a separate purchase

👎 Cons

  • Write speed of 90MB/s is notably lower than the read speed, which may limit burst photo buffer clearing
  • The bundled card reader is a third-party accessory and may not match the card's maximum transfer speeds
  • UHS-I interface is slower than UHS-II, which limits peak performance in cameras that support the faster standard
  • Not compatible with devices that only accept microSD without an adapter

Frequently Asked Questions

The bundle includes one SanDisk 256GB Extreme Pro SDXC memory card and one Everything But Stromboli Combo Card Reader for transferring files to your computer.
The card supports read speeds up to 170MB/s and write speeds up to 90MB/s, which is sufficient for continuous 4K UHD video recording and rapid photo burst capture.
Yes, the card carries both UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) ratings, which guarantee the sustained write speeds required for 4K UHD video recording.
The card is rated as waterproof, temperature proof, shockproof, and X-ray proof, making it resilient in demanding shooting environments.
The bundle includes an Everything But Stromboli Combo Card Reader, which supports multiple card formats for transferring data to a computer via USB.