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A small rectangular microSD card with a standard SD adapter both in black and red finish

SanDisk

SanDisk Extreme PRO 256GB microSDXC UHS-I U3 V30 A2 with adapter

SKU CH-AM5W-H24BB

256GB microSDXC card with UHS-I U3 V30 A2 ratings, up to 170MB/s read and 90MB/s write, includes SD adapter

  • Card typeMicroSD
  • TypemicroSDXC
  • Capacity256GB
  • Speed Class RatingUHS-I / Class 10
  • Read Speed170MB/S
  • Write Speed90mb/s

Capacity 256GB

  • Transfers 1000 photos and 24GB 4K video in under 3 minutes with 170MB/s read speed
  • Captures fast-action shots and 4K UHD video with 90MB/s write speed
  • Runs reliably from -25°C to 85°C operating temperature
  • Includes adapter for use in standard SD card slots
  • A2 rating speeds up app loading on smartphones and tablets

Capacity and card type

This is a SanDisk Extreme PRO microSDXC card with 256GB capacity. It uses the UHS-I bus and carries Class 10, U3, V30 and A2 speed ratings. A full-size SD adapter is included for devices that accept standard SD slots.

Who this suits and who should look elsewhere

Photographers and videographers shooting 4K UHD footage or fast-action bursts benefit from sustained write speeds up to 90MB/s. Content creators moving large libraries appreciate read speeds up to 170MB/s with a compatible reader. Users whose devices only support microSDHC or lack UHS-I support will not see the rated performance.

Deciding specification

The card delivers up to 170MB/s read and 90MB/s write over a UHS-I interface. This combination determines whether the card can keep pace with your camera's bitrate and whether your host device can realise the transfer rates quoted.

Highlights

  • Transfers 1000 photos and 24GB 4K video in under 3 minutes with 170MB/s read speed
  • Captures fast-action shots and 4K UHD video with 90MB/s write speed
  • Runs reliably from -25°C to 85°C operating temperature
  • Includes adapter for use in standard SD card slots
  • A2 rating speeds up app loading on smartphones and tablets

Specifications

BrandSanDisk
Card typeMicroSD
TypemicroSDXC
Capacity256GB
Speed Class RatingUHS-I / Class 10
Read Speed170MB/S
Write Speed90mb/s
Features0.59in x .043in x .04in (14.99mm x 10.92mm x 1.02mm)
OptionWith Adapter

Other versions of this model

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Questions about this item

Should I pick the 256GB version or a different capacity?

The card is available in 64GB, 128GB, 256GB, 400GB, 512GB and 1TB; choose the size that matches the amount of 4K footage or apps you plan to store.

What does the 170MB/s read speed mean when I copy files to my PC?

You can move roughly 1000 high-resolution photos or 24GB of 4K video in under three minutes with a compatible UHS-I reader.

How does the UHS-I interface affect real-world performance?

UHS-I limits the bus to the speeds shown — up to 170MB/s read and 90MB/s write — so a UHS-II reader will not go faster.

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