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SanDisk Extreme PRO CFexpress Type B memory card, black rectangular body with gold contacts

SanDisk

SanDisk Extreme PRO 128 GB CFexpress Type B 1.66 GB/s Read 1.17 GB/s Write memory card

SKU CH-4DFG-B7PP5

CFexpress Type B card with 128 GB capacity, 1.66 GB/s read and 1.17 GB/s write speeds for RAW 4K video capture

  • Read speeds up to 1.66 GB/s for rapid file transfer
  • Write speeds up to 1.17 GB/s sustain RAW 4K video capture
  • 128 GB capacity stores extended high-resolution footage
  • Backwards compatible with select XQD cameras via firmware
  • Includes RescuePRO Deluxe recovery software for data protection

CFexpress Type B card for RAW 4K capture

The SanDisk Extreme PRO 128 GB CFexpress Type B card is built for photographers and videographers who need sustained write performance for RAW 4K video. Read speeds reach 1.66 GB/s and write speeds reach 1.17 GB/s to handle high-bitrate recording without dropped frames. It targets professionals using compatible cinema or mirrorless bodies that require CFexpress Type B media.

Limits of the CFexpress Type B interface

The card delivers up to 1700 MB/s read and 1400 MB/s write, but real-world throughput depends on the host camera’s controller and firmware implementation. Sustained write speed can vary between camera models, especially during extended RAW bursts. Backwards compatibility is limited to select XQD cameras that have received a specific CFexpress firmware update from the manufacturer.

Installation notes and common issues

Insert the card into the CFexpress Type B slot with the label facing the correct orientation; it clicks into place like an XQD card. The most frequent problem is using the card in an XQD body that has not been updated with the required CFexpress firmware, which prevents recognition. A CFexpress Type B card reader is necessary for offloading footage at the rated 1700 MB/s read speed.

Highlights

  • Read speeds up to 1.66 GB/s for rapid file transfer
  • Write speeds up to 1.17 GB/s sustain RAW 4K video capture
  • 128 GB capacity stores extended high-resolution footage
  • Backwards compatible with select XQD cameras via firmware
  • Includes RescuePRO Deluxe recovery software for data protection

Specifications

BrandSanDisk

Questions about this item

Is the 128 GB capacity right for extended RAW 4K shoots or should I look at a larger card?

The 128 GB card stores less footage than higher-capacity models, so you will swap cards more often during long RAW 4K sessions.

Will the 1.66 GB/s read and 1.17 GB/s write speeds actually appear in my camera?

Those figures are the rated maximums; real-world throughput depends on your camera's CFexpress Type B implementation and firmware.

Does the CFexpress Type B interface limit the 1400 MB/s write speed in XQD cameras?

In XQD bodies with CFexpress firmware the card works, but the XQD bus caps sustained write below the 1400 MB/s rating.

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