SF3 Series - CFexpress/XQD Pro Card Reader

Professional Dual-Slot CFexpress 2.0 Type B/XQD Card Reader for Computers with Thunderbolt 4 or Thunderbolt 3 Ports

SF3 Series - CFexpress/XQD Pro Card Reader
CFexpress/XQD Pro Card Reader with MacBook Pro

Superior Ingest Performance

Whether you’re capturing 4K at 60P RAW video footage to CFexpress™ memory cards, or shooting hundreds of photos in a session and saving them to XQD™ memory cards, the generated files are huge, and the cards fill up fast. Moving those files to your computer for editing is a must, but if you use the wrong tool, you’ll spend a lot of time waiting around. Get a Sonnet SF3™ Series - CFexpress/XQD Pro Card Reader; it’s the ultimate tool for finishing the job fast.

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CFexpress and XQD Cameras

Key Features

Performance Icon

Superior Ingest Performance

Ingests footage from CFexpress 2.0 Type B cards and XQD cards at up to maximum supported speeds(1).

Ingest Times Icon

Cuts Ingest Times by up to Half

Dual card slots enable simultaneous ingest of footage from two cards for greater efficiency.

PCIe 3.0 x4 Icon

PCIe 3.0 x4 Thunderbolt 3 Device

Thunderbolt 3 provides four lanes of PCIe 3.0 (two lanes to each CFexpress/XQD card slot). A Thunderbolt 4 device would be limited to one lane total. Learn more about Thunderbolt 3 performance benefits over Thunderbolt 4.

Rugged Icon

Compact, Rugged, Stackable

Small and rugged aluminum enclosure for reliable operation; design enables multiple SF3 Series card readers to occupy same footprint.

Rackable Icon


Threaded mount points enable secure attachment of two readers side-by-side on a rack tray in just 1U of rack space.

Thunderbolt 3 Ports Icon

Two Thunderbolt Ports

One port connects to computer; second port supports daisy chaining of up to five additional SF3 Series pro card readers.

Thunderbolt 4 Port Icon

Forward Compatible

Sonnet's pro card readers are fully compatible with Thunderbolt 4 computers, and are purposely designed with Thunderbolt 3 (which has four lanes of PCIe 3.0 available).

Thunderbolt 2 Port Icon

Backward Compatible

Compatible with Thunderbolt 2 and Thunderbolt 1 Macs when used with an Apple® Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter and a Thunderbolt 2 cable (both sold separately).

Mac & Windows Icon

Mac & Windows Compatible

Supports Mac and Windows computers. (Supports only CFexpress cards on M1 Macs.)

Free Lifetime Tech Support
Why Thunderbolt 3 Instead of Thunderbolt 4?
Sonnet's line of pro card readers rely on Thunderbolt 3 technology for maximum performance. Learn Why ›
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.

– The SSD Review

Cut Ingest Times by up to Half

Dual Card Slots, Less Waiting
The SF3 Series - CFexpress/XQD Pro Card Reader is ultra-fast, able to ingest files from CFexpress and XQD cards at their maximum speeds(1). Better still, it can ingest files simultaneously from two CFexpress cards—at more than double the average ingest speed of other CFexpress or XQD card readers—to cut your ingest times in half.
Performance Chart
Performance Chart
Ready for Racking
Sonnet’s SF3 Series pro card readers include threaded mount points that enable you to securely attach two readers side-by-side on a rack tray in just 1U of rack space.
CFexpress/XQD Pro Card Readers Mounted On a Rack Tray
CFexpress/XQD Pro Illustration Front

The CFexpress/XQD Reader for Digital Imaging Technicians (DITs)

Measuring 5.75 inches wide by 1 inch tall by 3.5 inches deep, the SF3 Series - CFexpress/XQD Pro Card Reader is suitable for use in any workspace and workflow; for DITs working multi-camera shoots or in a small space, the Sonnet reader’s design advantages stand out.

CFexpress/XQD Pro Illustration Back
Ingest four, six, or more cards simultaneously at up to 2750 MB/s!
SF3 Series Pro Media Card Readers Stacked
Sonnet SF3 Series Pro Card Readers

Designed to be Stacked and Daisy Chained

SF3 Series pro card readers feature rugged aluminum enclosures designed to be stacked and daisy chained, enabling multiple CFast™ 2.0, CFexpress™/XQD™, RED MINI-MAG®, SxS™ Pro, and SxS PRO X readers to occupy the same footprint, while connecting to your computer through a single cable. You can take advantage of Thunderbolt’s up to 2750 MB/s of PCIe 3.0 x4 bandwidth to ingest four, six, or more cards simultaneously!

40Gbps Thunderbolt

Fastest External Interface Available

Featuring a dual-port 40Gbps Thunderbolt interface(2)(3), this reader ingests footage from all CFast memory cards to Mac and Windows computers with Thunderbolt 4 or Thunderbolt 3 ports—on location, in the studio, or in the edit suite—at up to the fastest speeds the cards will support.

Thunderbolt 40Gbps Ports Icons
Dual 40Gbps Thunderbolt Ports
One port is reserved for the connection to your Thunderbolt 4 or Thunderbolt 3 computer; the second port enables expansion of up to five additional Thunderbolt peripheral devices in a daisy chain.
10Gbps USB 3.1 Gen 2 Icon
10Gbps USB 3.2 Gen 2 Support
10Gbps USB 3.2 Gen 2 support allows you to connect a USB device(4) to the second port using the proper cable or adapter.
15W Power Icon
Provides 15W of Power
For peripherals requiring extra power, 15 watts is provided to bus-powered devices.
4K & 5K Display Icon
Supports Connecting One 5K 60Hz Display
Maximize the utilization of one computer Thunderbolt port.
Thunderbolt Ports
All the Right Connections

40Gbps Thunderbolt Cable and ThunderLok 3 Included

Sonnet includes a 0.5-meter Thunderbolt 3 cable that supports Thunderbolt's full 40Gbps bandwidth, and is fully compatible with Thunderbolt 4 computers. Sonnet also provides a ThunderLok 3 Thunderbolt connector retainer clip(5) that prevents accidental cable disconnections—just slide it over one end of the cable, and then plug in the connector and secure it to the reader by turning a thumbscrew. Because of its unique design, ThunderLok remains on the cable so it won’t get lost when not in use.
40Gbps Thunderbolt Cable with ThunderLok 3Supports Full 2750 MB/s PCIe Bandwidth Icon
Thunderbolt 4 Computers

Forward Compatible with Thunderbolt 4 Computers

SF3 Series professional media readers are fully compatible with Thunderbolt 4 computers. Sonnet’s media readers are purposely designed with a Thunderbolt 3 controller and its four lanes of PCIe (not available in a Thunderbolt 4 peripheral) to achieve maximum simultaneous ingest speeds. Learn more about the performance benefits of Thunderbolt 3 over Thunderbolt 4.

Apple M1 Logo

also compatible with M1 Macs

currently CFexpress cards only; see tech specs for details

Older Macs with Thunderbolt 2 Ports

Backward Compatible with Older Macs

No Thunderbolt 3 or 4? No problem—the SF3 Series - CFexpress/XQD Pro Card Reader is also compatible with Macs with Thunderbolt 2 or Thunderbolt ports when used with the bi-directional Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter and a Thunderbolt cable (both sold separately).

Learn why Sonnet's Pro Products Rely on Thunderbolt 3 Technology for Maximum Performance
See Tech Specs for footnotes.
Product specifications and information subject to change without notice. Computer hardware and accessories featured in photos that are not included with product are shown for illustration purposes; items sold separately.

SF3 Series - CFexpress/XQD Pro Card Reader