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SanDisk Extreme microSDXC Card Review: Is It Right for 4K Creators?

SanDisk 128GB Extreme microSDXC card +SD adapter, microSD card for smartphones, action cameras, drones, V30, up to 190 MB/s, SanDisk QuickFlow Technology, RescuePro Deluxe, UHS-I, 4k, V30, A2, U3
4.5
[Fast Card Offload]  Up to 190MB/s offload with SanDisk QuickFlow; achieves max speeds with PRO-READER (sold separately).
[Fast Write Speeds]  Up to 90MB/s write speeds for quick photo and burst shooting.
[4K Video Ready]  UHS Speed Class 3 (U3) and V30 rated for reliable 4K UHD recording.
[A2 App Performance]  Rated A2 for faster loading and improved in-app performance on devices.
[Rugged & Reliable]  Temperature-, water-, shock-, and X-ray-proof design for tough environments.
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A microSDXC card aimed at creators and travellers promising fast transfers and reliable 4K capture. SanDisk Extreme microSDXC Card helps content creators record and move large video files without fuss. Does the specification and durability match the needs of action-camera and drone workflows?

⚡ At a Glance
  • Storage Performance: Up to 190MB/s card offload speeds and up to 90MB/s write speeds; UHS-I, U3 and V30 rated with A2 app performance
  • Best for: Content creators using smartphones, action cameras and drones who record 4K video
  • Not ideal for: Workflows that require interface speeds beyond UHS-I or specialised high-end card formats

A 128GB microSDXC card with SanDisk QuickFlow Technology for faster offloads. Built for sustained 4K recording with A2, U3 and V30 ratings and rugged proofing.


Reliable 4K recording - with UHS-I U3 and V30 ratings

UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) designate suitability for high-bitrate video, while the A2 rating targets quicker app loading and execution. Sustained write capability and those class ratings help maintain continuous recording without frame drops.

Consistent recording performance keeps footage intact during long 4K shoots, making the card suitable for action cameras and drones.

Faster offloads and transfers - with SanDisk QuickFlow Technology

SanDisk QuickFlow Technology is engineered to accelerate card-to-host transfers, with advertised offload speeds up to 190MB/s. Maximum throughput is reached when paired with compatible readers such as SanDisk Professional PRO-READER SD and microSD.

Quicker transfers cut down wait times after shoots, speeding up post-production and freeing up time for the next session.

Tough handling in the field - with rugged testing and included recovery software

The card is tested to withstand temperature extremes, water exposure, shock and X-ray, and ships with RescuePro Deluxe for file recovery. These measures combine hardware resilience with a software safety net for accidental data loss.

Confidence in adverse conditions and an included recovery option reduce the risk of lost footage during travel or intense use.

✨ The 4 Key Reasons for SanDisk Extreme microSDXC Card
  1. Included SD adapter - Enables use in standard cameras and desktop card readers
  2. SanDisk QuickFlow Technology - Cuts transfer times when paired with compatible professional reader
  3. RescuePro Deluxe recovery - Helps recover accidentally deleted files and corrupt footage
  4. Rugged testing and proofing - Keeps data secure across temperature, water and shock conditions
📋 Technical Details at a Glance
  • Capacity: 128GB
  • Form factor: microSDXC
  • Read speed: Up to 190MB/s offload speeds (with supporting setup)
  • Write speed: Up to 90MB/s write performance
  • Interface: UHS-I
❓ Frequently Asked Questions

Q: Is this card suitable for 4K video recording?

A: Yes. The card is described as 4K UHD-ready with UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) ratings, which support sustained video recording.

Q: How fast are transfers and what is needed to reach top speed?

A: Offload speeds are up to 190MB/s powered by SanDisk QuickFlow Technology; pairing with a compatible reader such as the SanDisk Professional PRO-READER SD and microSD is required to achieve maximum speeds.

Q: Will the card survive rough outdoor use?

A: Built and tested to resist temperature extremes, water, shock and X-ray exposure, and supplied with RescuePro Deluxe for file recovery.

🏆 Our Verdict

Suited to creators who need dependable storage for 4K footage and quick file movement between devices. The combination of QuickFlow offloads, U3/V30/A2 ratings and rugged testing makes it a practical choice for action cameras, drones and smartphones. Durable construction and included recovery software add long-term value for on-location workflows.