NX-SB1PRO|CFexpress™ 4.0 CFexpress Type B USB 40Gbps Card Reader

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Revolutionizes Workflow with Next-Generation Technology

The NX-SB1PRO is a CFexpress Type B dedicated card reader/writer with a USB 40 Gbps (USB4®) interface which standard transfer rate is 5,000 MB/s.
This next-generation standard enables fast and reliable transfer of large amounts of data, dramatically improving the working environment.


USB 40Gbps (maximum transfer rate: 5,000 MB/s) maximizes the high-speed transfer performance of CFexpress Type B memory cards compatible with CFexpress 4.0 (maximum transfer rate specification: 4,000 MB/s)1.
NX-B2PRO330G CFexpress Type B memory card, which maximum read rate is 3,900 MB/s2, achieves a stable data read rate of 3,300 MB/s2 with NX-SB1PRO.

Stabilize High-Speed Transfer with Large Unique Heat Sink

To support the high-speed performance of CFexpress 4.0, a large heat sink with a unique structure was developed to improve the cooling performance inside the card body.
It effectively suppresses the temperature rise of the card body and card reader under high-speed transfer standards such as CFexpress 4.0 and USB 40Gbps.
By minimizing the occurrence of thermal throttling*, high-speed and stable data transfer can be realized, significantly improving work efficiency.

*Thermal throttling: a control function that suppresses the transfer speed to prevent thermal runaway

Fully Compatible with Existing Devices

The newest USB 40Gbps (USB4) standard delivers high-speed transfers while maintaining compatibility with previous standards, enabling long-term use with a wide range of devices.
While taking advantage of the advanced features of USB 40Gbps, it can also work seamlessly with existing devices.

User’s Guide for USB 40Gbps Compatible Products

When using USB 40Gbps products, there are several requirements for optimal performance.
For detailed procedures and conditions, see the guide below.

View User’s Guide ‣


NX-SB1PRO has been tested on PCs from various companies for use in a wide range of OS environments.

Check the compatibility ▸


Warranty and product support valid for 1 years from the purchase date





USB 40Gbps (USB4)

Media Type

CFexpress Type B

Max. Transfer speed1,2

USB 40Gbps Connection 3,300 MB/s

Port Type

USB Type-C®


USB bus-powered (no external power source)

Operating temperature

0 ℃ ~ 70 ℃ (32 °F to 158 °F)

Storage temperature

-40 ℃ ~ 60 ℃ (-40 °F to 140 °F)

Operating humidity

95 % or less (Non-condensing)

Storage humidity

95 % or less (Non-condensing)

Dimensions (W×L×D)

Approx. 59 × 100 × 17.2 mm
(2 3/8 × 4 × 11/16 in)


Approx. 110 g (3.88 oz)

Included items

・USB 40Gbps USB Type-C – USB Type-C cable (50 cm)

* Performance is not guaranteed if the included USB cable is not used.

* Paper instruction manual and warranty card are not included. Please download from the download page if necessary.


1 years from the date of purchase

Compatibility / Manual

NX-SB1PRO Compatibility
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Instruction manual [PDF]
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Product Support

  1. To connect via USB 40Gbps (USB4), the device must be used with USB 40Gbps (USB4) compatible devices.
  2. Based on Nextorage test conditions. The actual performance may vary with host devices and environments.

Design and specifications are subject to change without notice.
CFexpress is a trademark of the CompactFlash Association.
USB Type-C® and USB-C® are registered trademarks of USB Implementers Forum.
Other system names and product names are generally registered trademarks or trademarks of each manufacturer.