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Black microSDXC card with write-protect switch

SanDisk

SanDisk Extreme PRO 256GB SDXC UHS-I Memory Card V30 U3 Class 10 200MB/s 140MB/s

SKU CH-C55Y-EHM80

A 256GB SDXC card rated V30, U3 and Class 10 with 200.0 MB/s read and 140.0 MB/s write speeds, plus water and shock resistance

  • TypemicroSDXC
  • 200 MB/s read speed accelerates file off-loads
  • 140 MB/s write speed keeps up with burst shooting
  • V30 and U3 ratings guarantee sustained video capture
  • 256 GB capacity stores thousands of photos and clips
  • Water, shock and X-ray resistant design protects data in harsh conditions

Capacity and format

This 256GB microSDXC card uses the UHS-I bus and carries Class 10, U3 and V30 speed ratings. It is built for photographers and video creators who need reliable storage for high-resolution images and 4K footage. The integrated write-protect switch adds a physical safeguard against accidental erasure. Compatibility extends to most devices that accept SDXC media.

Rugged build and daily handling

The card is shock resistant and water resistant, so it survives drops, splashes and harsh environments encountered on location. Its black housing fits standard microSD slots without adapters. QuickFlow technology is designed to accelerate media off-loads when paired with compatible readers, reducing the time spent transferring large batches of files. The durable construction supports continuous field use.

Deciding specification

Maximum read speed reaches 200.0 megabytes per second while maximum write speed reaches 140.0 megabytes per second. These sustained rates determine whether the card can keep up with your camera’s bitrate during long 4K recording sessions. If your workflow demands faster ingest or higher sustained write throughput, this card may not meet that requirement.

Highlights

  • 200 MB/s read speed accelerates file off-loads
  • 140 MB/s write speed keeps up with burst shooting
  • V30 and U3 ratings guarantee sustained video capture
  • 256 GB capacity stores thousands of photos and clips
  • Water, shock and X-ray resistant design protects data in harsh conditions

Specifications

TypemicroSDXC

Questions about this item

What does the UHS-I interface mean for real-world transfer speeds on this card?

The UHS-I bus supports the card's rated 200.0 MB/s read and 140.0 MB/s write speeds, which are the maximum achievable with compatible host devices.

What physical slot size and card format does the 256GB Extreme PRO require?

It uses the microSDXC form factor, so it fits any microSDXC or SDXC slot with the included adapter.

How do I install the card and enable the write-protect switch correctly?

Insert the card label-side up until it clicks; slide the integrated switch toward the contacts to unlock writing before use.

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