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OWC Atlas CFexpress 4.0 Type B Card Reader

BH #OWTCCFXB4RDR • MFR #OWCTCCFXB4RDR
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OWC Atlas CFexpress 4.0 Type B Card Reader
Key Features
  • 1 x CFexpress 4.0 Type B Card Slot
  • 40 Gb/s USB4 Interface
  • Data Transfer Speeds up to 5000 MB/s
  • Bus Power | Innergize Mode
The Atlas CFexpress Type B Card Reader from OWC / Other World Computing offers a high-speed workflow with fast transfer speeds. Equipped with one CFexpress 4.0 Type B slot, this reader takes advantage of the 40 Gb/s USB4 bus to deliver transfer speeds of up to 5000 MB/s. Compatible with Windows, Mac, Chrome, iOS, iPadOS, and Android, this card reader may be used with USB-C, Thunderbolt 3, and Thunderbolt 4 ports and operates using bus power. An integrated LED indicator lets users confirm use status and non-skid rubber feet help keep it in place. Included is a 20" USB4 cable and a CFexpress Type A to Type B adapter, which is only to be used in this card reader and not in cameras.
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$99.99
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OWC Atlas CFexpress Type B Overview

The Atlas CFexpress Type B Card Reader from OWC / Other World Computing offers a high-speed workflow with fast transfer speeds. Equipped with one CFexpress 4.0 Type B slot, this reader takes advantage of the 40 Gb/s USB4 bus to deliver transfer speeds of up to 5000 MB/s. Compatible with Windows, Mac, Chrome, iOS, iPadOS, and Android, this card reader may be used with USB-C, Thunderbolt 3, and Thunderbolt 4 ports and operates using bus power. An integrated LED indicator lets users confirm use status and non-skid rubber feet help keep it in place. Included is a 20" USB4 cable and a CFexpress Type A to Type B adapter, which is only to be used in this card reader and not in cameras.

Please note that to obtain maximum performance, Apple systems with M2, M1 Pro, and M1 Max processors should update to macOS 13.3 or later. Apple systems with an M1 chip will experience lower data transfer speeds due to M1 limitations. Thunderbolt 3 requires macOS 11.1 or later.

Blast Off to a New World of Productivity
Leave workflow constraints behind and blast off into a new world of productivity with the Atlas USB4 CFexpress 4.0 Type B Card Reader. Powered by all "the right stuff" when it comes to performance, compatibility, and convenience, you'll save time with OWC's fast CFexpress memory card reader by dramatically reducing ingestion time while being able to work practically anywhere with millions of past, present, and future USB machines and devices.
It's Your Time
Your productivity is only as good as your gear. You paid a lot for that blazing fast external drive, so don't handcuff its speed by offloading to it from a slow reader. Keep investing in your workflow and reap the reward of gaining precious time back for your personal life by streamlining projects with the Atlas USB4 CFexpress 4.0 Type B Card Reader.
As Fast as the Card and Connection
Featuring a highly effective heatsink and heat-resistant internal components to prevent thermal throttling, the Atlas USB4 CFexpress 4.0 Type B Card Reader is a fast and reliable solution available for ingesting CFexpress 4.0 Type B media cards. You can also use this innovative little gem to get maximum speed from your CFexpress 2.0 Type B cards. With automatic computer connection speed detection, you'll always get maximum performance in every use.
Over 4x Faster Ingestion vs. 10 Gb/s USB 3.2 Gen 2 Readers
You're a pro, so you're expected to move at the speed of innovation. While 10 Gb/s USB-C readers are fast, you will dramatically reduce ingestion times when you power your work with the Atlas USB4 CFexpress 4.0 Type B Card Reader. And depending on the computer you connect to, it's twice as fast as OWC's Atlas FXR Thunderbolt reader.
Pocked-Sized Powerhouse
Slip the Atlas USB4 CFexpress 4.0 Type B Card Reader into your smallest camera bag while still being able to pack all the accessories you need to capture incredible content. You can also pair this pocket-sized reader with a USB-C equipped tablet to create a super lightweight, yet mightily powerful capture and edit solution.
Complete and Secure
By switching the reader into Innergize mode, you can push past the limits of flash technology by ensuring your OWC Atlas Memory Cards are always ready to deliver the highest level of workflow performance and reliability. And for the ultimate in workflow confidence, an OWC ClingOn cable stabilizer (available separately) can be added to prevent USB-C cable disconnections.
Innergize Your Workflow with High Performance and Reliability
OWC Innergize is the first stage of the Capture to Completion ecosystem of OWC products designed to seamlessly propel professional photographers, videographers, and content creators to the highest level of workflow performance and reliability. This OWC custom-designed app is a complete health, performance, and field upgrade management tool when using OWC Atlas memory cards with OWC Atlas readers and reader equipped products.
Host Port Requirements
  • USB4, USB-C, Thunderbolt 3, or Thunderbolt 4
macOS Compatibility
  • macOS 11.x Big Sur
  • macOS 12.x Monterey
  • macOS 13.x Ventura
  • macOS 14.x Sonoma
  • macOS 15.x Sequoia
Windows Compatibility
  • Windows 10 (32-bit)
  • Windows 10 (64-bit)
  • Windows 11
Mobile OS Compatibility
  • iOS 18
  • iOS 17
  • iPadOS 18
  • iPadOS 17
  • iPadOS 16
  • iPadOS 15
  • Android 14.x
  • Android 13.x
Other OS Compatibility
  • Chrome OS
UPC: 810149208904

OWC Atlas CFexpress Type B Specs

Media Card Reader
1x CFexpress Type B (CFexpress 4.0 Type B / PCIe 4.0 x2)
Host Connection
USB-C (USB4) via Detachable Cable
Power Source
Bus Powered
Dimensions
3.11 x 3.11 x 0.91" / 7.9 x 7.9 x 2.3 cm
Weight
0.32 lb / 145 g
Packaging Info
Package Weight
0.48 lb
Box Dimensions (LxWxH)
5 x 4.7 x 1.6"

OWC Atlas CFexpress Type B Reviews

Pleased with operating temps :)

By Kenny
Rated 4 out of 5
Date: 2026-02-26

The main reason for this purchase was my prograde reader ran so hot I do believe it was the cause of an expensive card failure. This OWC reader runs much much cooler. The speed wasnt that big of a selling point for me. Maybe some seconds to a minute longer, depending on the size of the transfers is all that adds up to. But my results didn't add up to the claim of OWC. I formatted the card before the test, if that even matters. Results are below . the 4 stars are due to the results. if anyone can tell me why I did not get close to the speed of the card, please let me know, thanks

Great CFexpress Type B Card Reader

By Jeff
Rated 5 out of 5
Date: 2025-11-10

I Have A 2024 IMac With Thunderbolt 4 Connections And The OWC Atlas CFexpress 4.0 Type B Card Reader Works As Advertised At Those Data Speeds. Fantastic! The Build Quality And Fit And Finish Are Excellent. And They Include A Thunderbolt 4 Cable. Set Up Was Extremely Quick And Easy - Just Plug And Play. Love OWC As A Company And I Can Highly Recommend This And Their Other Products.

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