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SanDisk Extreme CompactFlash memory card, 128GB, black rectangular card with label

SanDisk

SanDisk Extreme CFXSB-128G-G46 128GB memory card

SKU CH-AGT5-0XM6B MPN CFXSB-128G-G46

A 128 GB CompactFlash card with 120 MB/s read and 85 MB/s write speeds for DSLR burst shooting and Full HD video

  • Total capacity128 GB
  • Memory card formatFull Size SD
  • Speed classUDMA 7
  • Max read speedup to 120 MB/s
  • Write throughputup to 85 MB/s
  • Product typeCompact Flash (CF)

Capacity 128GB

Series Extreme (90MB/s +)

  • 128 GB capacity stores thousands of RAW photos and Full HD clips
  • Up to 120 MB/s read speed moves large files to your computer quickly
  • Up to 85 MB/s write speed keeps up with continuous burst shooting
  • VPG-20 rating guarantees 20 MB/s minimum sustained video recording
  • UDMA 7 support enables maximum throughput in compatible DSLR cameras

SanDisk Extreme 128GB CompactFlash Card

The SanDisk Extreme CFXSB-128G-G46 is a 128GB CompactFlash card built for mid-range to high-end DSLR cameras and HD camcorders. It delivers read speeds up to 120MB/s and write speeds up to 85MB/s for fast burst shooting and efficient file transfers. The card carries a VPG-20 rating that guarantees a minimum sustained write speed of 20MB/s for Full HD 1080p video recording.

CompactFlash UDMA 7 interface limits

This card uses the CompactFlash UDMA 7 interface with a maximum read speed of 120MB/s and write speed of 85MB/s. Actual throughput depends on the host device's controller and firmware support for UDMA 7. Older card readers or cameras limited to earlier UDMA modes will not reach the rated speeds. The VPG-20 guarantee applies only when the host sustains the required 20MB/s minimum write rate.

Check your camera and reader compatibility

Verify that your DSLR or camcorder accepts full-size CompactFlash cards and supports UDMA 7 for the advertised performance. Confirm the device can write at a sustained 20MB/s or higher to utilise the VPG-20 video guarantee for 1080p footage. Ensure your card reader connects via a sufficiently fast bus such as USB 3.0 to benefit from the 120MB/s transfer rate.

How it compares

Measured against everything we stock in SD & MicroSD Memory Cards, at today’s prices. Recalculated every night.

Price $112.99
Pricier than about 75% of the 1,947 comparable items (median $46.99).
Total capacity 128 GB
Higher than about 60% of the 1,132 comparable items (median 64 GB).
Price per TB $882.73 per TB
Pricier than about 81% of the 901 comparable items (median $374.69 per TB).

Specifications

Product
Brand nameSanDisk
Product lineExtreme
Model nameCFXSB-128G-G46
Total capacity128 GB
Product typeCompact Flash (CF)
Performance
Speed classUDMA 7
Max read speedup to 120 MB/s
Write throughputup to 85 MB/s
Storage
Memory card formatFull Size SD

Other versions of this model

5 more in the same range

Questions about this item

Should I choose the 16GB, 32GB, 64GB or 128GB version of this card?

The 128GB model gives the most room for RAW files and Full HD video; smaller capacities cost less but fill up faster during long shoots.

What does the 120MB/s read speed mean when I copy files to my computer?

It is the maximum transfer rate the card can sustain; real-world offload times depend on your card reader and USB bus, but large batches move noticeably quicker than on slower cards.

How does the UDMA 7 interface affect performance in my camera?

UDMA 7 is the fastest CompactFlash mode and allows the card to reach its rated 85MB/s write and 120MB/s read speeds in compatible DSLR bodies.

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