The SSD Review

REVIEW: Sonnet SF3 CFexpress/QXD Pro Thunderbolt 3 Card Reader – All That Speed!

The Sonnet SF3 Series CFexpress/XQD Pro Card Reader is one of the few on the market today that will allow you to use your CFexpress card to its full performance capabilities.  Its build is beyond reproach with a smooth brushed aluminum exterior with ribbing that acts as a heatsink, two ports in the front that will accommodate CFexpress Type B or XQD cards, as well as two Type-C [Thunderbolt 3] ports at the back to allow for daisy chaining as Thunderbolt 3 does.

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Technical Specifications

Mac, Windows, and Linux Logos


Mac Compatibility

  • Mac (M1) as follows:
  • Compatible with CFexpress cards
  • Not currently compatible with XQD cards (Sony M1-compatible driver for XQD Cards expected)
  • macOS® 10.12.6+
  • macOS Big Sur compatible(4)

Windows Compatibility

  • Computer with Thunderbolt 3 or Thunderbolt 4 ports
  • Window 10 (64-bit Edition Version 1909 or greater)


Part Number

  • SF3-2CFEX


  • 2-year

Form Factor

  • Portable card reader

Bus Interface

  • 40Gbps Thunderbolt 3

External Connectors

  • Two CFexpress 2.0 Type B/XQD card slots
  • Two Thunderbolt 3 ports
  • Power port

Power Adapter

  • Universal 60W, 100-240V AC, 50–60 Hz

Supported Media

  • CFexpress 2.0 Type B
  • XQD

Cameras Supporting CFexpress/XQD (March 2021)

  • CFexpress 2.0 Type B
  • Canon EOS-1D X Mark II
  • Canon EOS-1D X Mark III
  • Canon EOS C500 Mark II
  • Canon EOS R5
  • CFexpress 2.0 Type B or XQD
  • Nikon D5 (CFexpress with firmware 1.40)
  • Nikon D6
  • Nikon D500 (CFexpress with firmware 1.30)
  • Nikon D850 (CFexpress with firmware 1.20)
  • Nikon Z6
  • Nikon Z6 II
  • Nikon Z7
  • Nikon Z7 II
  • Panasonic Lumix DC-S1
  • Panasonic Lumix DC-S1R
  • XQD
  • Nikon D4
  • Nikon D4s
  • Phase One XF IQ4
  • Sony PXW-FS7
  • Sony PXW-FS7M2
  • Sony PXW-FS7M2K
  • Sony PXW-FX9

Reader Dimensions (WxDxH)

  • 5.75 x 3.5 x 1 in. (147 x 88.3 x 35.6 mm)


  • Reader and Power Adapter: 1.35 lbs (0.6 kg)
  • Complete Package: 2.10 lbs (1 kg)

RoHS Compliant

  • Yes

Package Contents

  • Sonnet SF3 Series - CFexpress/XQD Pro Card Reader
  • Power adapter
  • Power cable
  • 0.5-meter Thunderbolt 3 cable
  • ThunderLok 3 retainer clip
  • Documentation

Support Links

Support Knowledge Base

Drivers, Documentation, FAQs

Product Manual

PDF Icon

Mounting Instructions

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Technical Notes


Thunderbolt 3 Cable (0.7-meter)

Thunderbolt 3 Cable (0.7-meter)

Part No. TCB-TB3-07M

  • 0.7-meter Thunderbolt 3 (40Gbps) cable
  • Delivers full 40Gb/s bandwidth
  • Supports 100W of Power Delivery (PD)
  • Compatible with Sonnet ThunderLok 3
ThunderLok 3L

ThunderLok 3L

Part No. TB3-LOK2L

Secures Sonnet 1- and 2-meter Thunderbolt 3 (40Gbps) active cables with ThunderLok 3L-compatible products.

Not compatible with Sonnet 0.5- or 0.7-meter Thunderbolt 3 (40Gbps) passive cables.
ThunderLok 3

ThunderLok 3

Part No. TB3-LOK2

Secures Sonnet 0.5- or 0.7-meter Thunderbolt 3 (40Gbps) passive cables with ThunderLok 3-compatible products.

Not compatible with Sonnet 1- or 2-meter Thunderbolt 3 (40Gbps) active cables.
Power Adapter

Power Adapter

Part No. PWR-5A-12VA

Spare power adapter (12V, 5A).

SF3 Series - CFexpress/XQD Pro Card Reader