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Product Description

High Performance and High Reliability Meet High Style

Built with SanDisk’s sixth-generation TLC flash, the X400 SSD offers quick responsiveness, high reliability and low power for a seamless experience for thin and ultramobile notebooks. It’s the ideal storage solution for heavy workloads such as photo and video editing, multitasking or office productivity.

Thin Is In

With a 1.5mm single-sided form factor (M.2 2280 module), the X400 SSD is the first single-sided 1TB SSD in the industry, giving it the performance and capacities ideal for ultrathin designs. The X400 SSD is also available in 2.5” 7mm-height to be a true drop in replacement for mechanical HDDs.

nCache TM 2.0 and DataGuardTM: Advanced Technologies for A Better Experience

SanDisk technologies combine nCache 2.0, DataGuard and LDPC error correction into the X400 SSD for a superior experience and endurance levels up to 320 TBW (terabytes written), our highest ever for a client drive. SanDisk nCache 2.0 is a set of advanced algorithms that analyze workloads to improve fast burst performance and sustained sequential write speeds while minimizing energy consumption and controller overhead. The X400 SSD is backed by a 5-year warranty.

Designed With Security in Mind

The X400 SSD includes self-encrypting drive (SED) capabilities to quickly and easily protect sensitive documents from theft or disclosure. We also support TCG Opal 2.0 for interoperability with a wide spectrum of security software platform.

Additional Information


Solid-state drive capacity 256 GB
Solid-state drive interface M.2
Read speed 540 MB/s
Write speed 520 MB/s
Mean time between failures (MTBF) 1750000 h


SSD form factor M.2
Colour of product Black
Certification FCC, UL, TUV, KC, BSMI, VCCI

Technical details

Operating temperature (T-T) 0 - 70 °C
Storage temperature (T-T) -55 - 85 °C
Operating shock 1500 G

Weight & dimensions

Width 22 mm
Depth 80 mm
Height 1.5 mm

Packaging data

Quick start guide Yes

Other features

Internal Yes

X400 256GB M.2 M.2 Solid State Drive

Product Code: SD8SN8U-256G-1122
£100.62 inc. VAT Availability: 20 In Stock
256 GB, SSD, M.2 (2280), 22 x 80 x 1.5 mm
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    Free next working day delivery. For same day dispatch order before 3pm.

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  • Returns:

    If you change your mind, we offer a reliable 14 day money back guarantee.