Corsair EX400U

4 TB
Price in EUR including VAT
EUR246,95/1TB
Delivered between Thu, 7.8. and Thu, 14.8.
free shipping

Memory Size

Product details

Blazing-fast speeds offer data rates of up to 4,000 MB/s for sequential read and up to 3,600 MB/s for sequential write.

Compatible with USB Type-C hosts, connect via USB Type-C and Thunderbolt 4 and newer for comprehensive compatibility.

The compact design allows you to take the EX400U with you for powerful storage on the go.

The high-speed interface ensures broad compatibility and enhanced functionality.

Easy to set up with any device, ready to use instantly with a single connection for power and data to PC or Mac.

Key specifications

Interface
USB 4USB-C
Read transfer speed
4000 MB/s
Write transfer speed
3600 MB/s
Item number
53638607

General information

Manufacturer
Corsair
Category
External SSD
Manufacturer no.
CSSD-EX400U4TB
Release date
16.12.2024

Colour

Colour
Grey
Exact colour description
Gun metal

Data storage properties

Storage capacity
4 TB
Interface
USB 4USB-C
Read transfer speed
4000 MB/s
Write transfer speed
3600 MB/s

Origin

Country of origin
USA

Voluntary climate contribution

CO₂-Emission
Climate contribution

Scope of delivery

Scope of delivery
1 pieceUSB-C to USB-C cable

Product dimensions

Length
6.43 cm
Width
6.40 cm
Height
1.19 cm
Weight
92 g

Package dimensions

Length
13.50 cm
Width
11 cm
Height
2.80 cm
Weight
102 g

Legal Notice

Product Safety

14-day cancellation right
30-day right of return
24 Months statutory warranty

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Reviews & Ratings

Statutory warranty score

How often does a product of this brand in the «External SSD» category have a defect within the first 24 months?

Source: Galaxus
  • 3.Transcend
    0,4 %
  • 3.WD
    0,4 %
  • 6.Corsair
    0,5 %
  • 6.SanDisk
    0,5 %
  • 8.Lexar
    0,6 %

Statutory warranty case duration

How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?

Source: Galaxus
  • Corsair
    Not enough data
  • 1.Adata
    0 days
  • 1.Intenso
    0 days
  • 1.Transcend
    0 days
  • 4.Crucial
    2 days

Return rate

How often is a product of this brand in the «External SSD» category returned?

Source: Galaxus
  • 5.WD
    0,9 %
  • 7.SanDisk
    1 %
  • 8.Corsair
    1,1 %
  • 8.Kingston
    1,1 %
  • 10.Crucial
    1,2 %
Source: Galaxus

Translation: machine translated
Overall ratingVery good90/100
Without ratingNo rating
CT Magazin Logo
CT MagazinSingle testReleaseJuly 2025

USB4 is gaining ground as an equally fast alternative to the expensive Thunderbolt, especially in notebooks. However, the range of USB4 SSDs is still quite limited. Corsair joins the ranks with the compact EX400U, the first SSD with the U21 controller from Phison. This converts the USB4 signals directly for the flash devices; the usual intermediate PCIe step is omitted...

Very good90/100
Macwelt spezialSingle testReleaseApril 2025
  • PositiveHigh data transfer rate
  • PositiveCompact dimensions
  • PositiveMagsafe ring for iPhone
  • PositiveRugged cable
  • NegativePlastic housing

With the EX400U, Corsair has fulfilled the desire of many media professionals for a compact and powerful external SSD. It combines a small housing with USB4 speed. And in view of the attractive price, the plastic housing is a good thing.

This test report belongs to a different type: EX400U (2 TB)