256GB UHS-II SD Card UHS-II Memory Card Fast Storage - Pro 8K Ready

Our review finds the 256GB UHS-II SD card EF6 is aimed squarely at professional photographers, filmmakers and content creators who need fast, reliable storage on location. The single biggest reason to buy is the sustained high throughput: with up to 300 MB/s read and 250 MB/s write speeds it removes the storage bottleneck for continuous burst shooting and cinema-quality 4K and 8K-UHD recording. Durability testing for water, shock, X-ray and extreme temperatures also means it is built to survive demanding shoots.

Key Features

• High read/write speeds: Up to 300 MB/s read and 250 MB/s write allows rapid offload and supports continuous burst shooting without frame drops.
• Video Speed Class V90: The V90 rating ensures consistent performance for recording 4K and 8K-UHD video on compatible cameras and camcorders.
• Large capacity: 256 GB of usable space (actual user storage may be less) holds thousands of high-resolution images and hours of HD video for long sessions.
• Rugged design: The card is tested to be waterproof, shockproof and X-ray proof and tolerates extreme temperatures for reliable field use.
• Fast transfers: UHS-II interface speeds speed up workflow when moving large video files to a workstation or backup drive.

Who It's For

This card is best for professional-level photographers and videographers who regularly shoot high-bitrate video or long burst sequences and need a single 256 GB card they can rely on. It is also a solid pick for content creators using cameras that benefit from UHS-II speeds and Video Speed Class 90 performance.

Amateur shooters with light recording needs may find less expensive UHS-I cards are sufficient, and anyone whose camera does not support UHS-II will not see the full speed advantage. Also, buyers should verify card compatibility with their specific camera models before purchasing.

Pros & Cons

Pros

• Very fast sustained read and write performance for burst shooting and high-bitrate video.
• Durable construction protects data during travel and tough shoots.
• Large 256 GB capacity reduces the need to swap cards during long jobs.
• Good value for professional shooters who need both speed and capacity.

Cons

• Not all users will see UHS-II speeds if their camera or reader is limited to UHS-I, so compatibility matters.
• Some customers reported receiving the wrong size in rare cases, so buy from trusted sellers and check the label on arrival.

Specifications

Capacity	256 GB
Read Speed	Up to 300 MB/s
Write Speed	Up to 250 MB/s
Speed Class	Class 10, U3, V90
Interface	UHS-II
Durability	Waterproof, shockproof, X-ray proof, extreme temperature resistant

Our Verdict

The 256GB UHS-II SD card EF6 is a strong choice for professionals who need high-capacity media that keeps up with modern cameras' burst and video demands. Its combination of V90 performance, rugged build and large storage makes it good value for on-location photographers and filmmakers, provided the host camera supports UHS-II speeds.

Frequently Asked Questions

Will this card record 8K video?
Yes, the card carries a V90 rating and the stated speeds to support 4K and 8K-UHD recording on compatible cameras.

Is the card durable for travel and outdoor shoots?
Yes, it is advertised and tested as waterproof, shockproof, X-ray proof and tolerant of extreme temperatures for field use.

Will I get full speed in any camera?
You will only see full UHS-II speeds in cameras and card readers that support the UHS-II interface; UHS-I hosts will limit performance.