Corsair EX400U

1 TB
CHF223.–/1TB
Delivered tomorrow
8 pieces in stock
free shipping

Memory Size3

Product details

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

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

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

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

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

Key specifications

USB ports
ThunderboltUSB-C
Read transfer speed
4000 MB/s
Write transfer speed
3500 MB/s

General information

Item number
53638606
Manufacturer
Corsair
Category
External SSDs
Manufacturer no.
CSSD-EX400U1TB
Release date
16.12.2024

Colour

Colour
BlackGrey
Exact colour description
BlackGreyGreyGunmetal

Data storage properties

Storage capacity
1 TB
USB ports
ThunderboltUSB-C
Read transfer speed
4000 MB/s
Write transfer speed
3500 MB/s

Origin

Country of origin
China

Sustainability

Manufacturer commitment
SBTi

Voluntary climate contribution

CO₂ emissions
17.39 kg
Climate contribution
CHF 0.42

Scope of delivery

Scope of delivery
USB C to C cable

Product dimensions

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

Package dimensions

Length
13.60 cm
Width
11.10 cm
Height
3.30 cm
Weight
105 g

30-day right of return
36 Months Warranty (Bring-in)

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Reviews & Ratings

Warranty score

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

Source: Digitec Galaxus
  • 14.Crucial
    1.4 %
  • 15.Silicon Power
    1.6 %
  • 16.Adata
    1.7 %
  • 17.Corsair
    2.1 %
  • 18.SanDisk Professional
    2.6 %

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: Digitec Galaxus
  • 1.OWC
    1 day
  • 2.Adata
    3 days
  • 2.Corsair
    3 days
  • 2.Crucial
    3 days
  • 2.Intenso
    3 days

Return rate

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

Source: Digitec Galaxus
  • 12.LaCie
    2.1 %
  • 14.Lexar
    2.4 %
  • 15.OWC
    4.5 %
  • 16.Corsair
    5.4 %
  • 17.SanDisk Professional
    6.6 %
Source: Digitec 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)