NX-B1SE Series|CFexpress™ Type B Memory Card

256 GB / 128 GB

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empower your shooting

NX-B1SE Series CFexpress Type B memory card is designed for professional photographers and enthusiasts who need to accurately capture the details of capture the split-second actions. Rigorously developed and tested, this card provide both reliable shooting and a comfortable workflow.

BooST your workflows

The high speeds maximize the performance of a high-resolution camera, does not slow down the continuous shooting speed due to buffer full, nor does it cause waiting time for writing. Reduces stress during shooting while shortening the time required to copy a huge number of cuts to a PC.

Max. Read1
NX-B1SE256G:1,950 MB/s
NX-B1SE128G:1,100 MB/s

Max. Write1
NX-B1SE256G:1,100 MB/s
NX-B1SE128G:550 MB/s

Min. Sustained Write1
NX-B1SE256G:200 MB/s
NX-B1SE128G:100 MB/s

Recommended CFexpress Type B by usage

Still Photo Shooting
Single Shooting Continuous Shooting with Camera Buffer High Speed Continuous Shooting Recommended Shooting Scene
・Still Life
Movie Recording
Full HD DCI 4K 30fps/
UHD 4K 30fps
DCI 4K 60fps/
6K RAW 60fps
4K 120fps/
8K 30fps
8K 120fps/
6K 160fps


Exterior durability is tested in an environment compliant with CompactFlash Association regulations:

  • Operating Temperature Resistance: 14 ℉ to 158 ℉
  • Shock Resistance
  • X-ray Resistance
  • UV Resistance
  • Magnetic Resistance
  • Anti-Static


Nextorage is testing the operation in various recording modes with the latest high-end cameras. See below for the latest compatibility information:

Check the compatibility ▸


Sometimes, things can go wrong and you might accidentally delete files or photos. Nextorage’s easy-to-use tool, Memory Card File Rescue app, recovers your precious data. Available as free download for Nextorage memory card owners.

Does not support data recovery for content protected and game data files. Not all data may be recoverable.

Learn more ▸


Warranty and product support valid for 5 years from the purchase date


Model / Capacity*

NX-B1SE128G / 128 GB
NX-B1SE256G / 256 GB

* 1 GB = 1 billion bytes. The actual usable capacity (user area) is smaller than the indicated capacity due to its use for system area.

Form Factor

CFexpress Type B


PCIe®3.0 × 2, NVMe 1.4

NAND Flash


Max. speed (Read)1

NX-B1SE128G:1,100 MB/s
NX-B1SE256G:1,950 MB/s

Max. speed (Write)1

NX-B1SE128G:550 MB/s
NX-B1SE256G:1,100 MB/s

Min. Sustained speed (Write)1

NX-B1SE128G:100 MB/s
NX-B1SE256G:200 MB/s


Not Support

Operating Voltage

3.3 V

Operating environment

14 ℉ to 158 ℉ (-10 ℃ to 70 ℃)

Storage environment

-40 ℉ to 185 ℉ (-40 ℃ to 85 ℃)

Dimensions (W×L×T)

Approx. 29.6 ㎜ × 38.5 ㎜ × 3.8 ㎜
(1 3/16 in. × 1 9/16 in. × 5/32 in.)


Approx. 9 g (0.32 oz)

Included item

・Instruction manual & warranty


5 years from the date of purchase

Durability 2

Operating Temperature resistance

14 ℉ to 158 ℉ (-10 ℃ to 70 ℃)

Shock resistance

EIA-364-27A compliant

X-ray resistance

ISO7816-1 compliant

UV resistance

ISO7816-1 compliant

Magnetic resistance

Based on Nextorage internal testing


Certified to IEC 61000-4-2 standard

Software / Compatibility / Manual

Memory Card File Rescue
Detail & Download ▸
CFexpress Type B Memory card compatible devices
View ▸
NX-B1SE Series Instruction Manual[PDF]
View ▸
Product Support

  1. Based on Nextorage test conditions. Actual performance may vary and are dependent on environmental and usage.
  2. Durability ratings are based on Nextorage test conditions. Product damage or data corruption is not guaranteed under all circumstances; the durability of SD conversion adapters is outside the scope of this test.

Design and specifications are subject to change without notice.
The VPG logo and CFexpress is a trademark of the CompactFlash Association.
PCle is trademarks of PCI-SIG.
NVMe is a trademark of NVM Express, Inc.
Other system names and product names are generally registered trademarks or trademarks of each manufacturer