Corsair EX300U 1TB External SSD

1 TB
CHF166.35/1TB
Ratings
BrandMore from Corsair
Test reportsVery good based on 1 test
Delivered between Tue, 30.6. and Wed, 8.7.
Only 1 piece in stock at supplier
free shipping

Memory Size3

Product details

The Corsair EX300U 1TB external SSD offers a powerful and reliable storage solution for users who require high speeds and large storage capacity. With a storage capacity of 1 terabyte, this device allows for the storage and transfer of large amounts of data, whether for multimedia content, games, or important documents. The SSD utilizes the modern USB-C interface and supports USB 3.1, enabling a maximum read speed of up to 1100 MB/s and a write speed of also up to 1100 MB/s. This ensures fast data transfer and efficient work. The exFAT file system guarantees compatibility with both Windows and Mac OS operating systems, making it easy to use across different devices. Its compact design and sleek black finish make the EX300U a practical companion for on-the-go use.

  • Maximum read speed of 1100 MB/s
  • Maximum write speed of 1100 MB/s
  • Compatible with Windows and Mac OS via exFAT file system
  • USB-C interface for fast data transfer.

Key specifications

USB ports
USB-C
Read transfer speed
1100 MB/s
Write transfer speed
1100 MB/s

General information

Item number
62292671
Manufacturer
Corsair
Category
External SSDs
Manufacturer No.
CSSD-EX300U1TB
Release date
30.9.2025

Colour

Colour
Black, Grey
Exact colour description
Black, Grey

Data storage properties

Storage capacity
1 TB
USB ports
USB-C
Read transfer speed
1100 MB/s
Write transfer speed
1100 MB/s

Origin

Country of origin
Taiwan

Sustainability

Manufacturer commitment
SBTi

Voluntary climate contribution

CO₂ emissions
2.44 kg
Climate contribution
CHF 0.11

Scope of delivery

Scope of delivery
USB C to C cable

Product dimensions

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

Package dimensions

Length
13.50 cm
Width
11 cm
Height
2.50 cm
Weight
96 g

30-day right of return
24 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
  • 12.Crucial
    1.5 %
  • 12.OWC
    1.5 %
  • 14.Adata
    1.6 %
  • 15.Corsair
    2 %
  • 16.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
  • Corsair
    Not enough data
  • 1.Adata
    2 days
  • 1.Crucial
    2 days
  • 1.Intenso
    2 days
  • 1.Kingston
    2 days

Return rate

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

Source: Digitec Galaxus
  • 13.Adata
    2.2 %
  • 14.LaCie
    2.5 %
  • 15.OWC
    4.5 %
  • 16.Corsair
    4.9 %
  • 17.SanDisk Professional
    5.2 %
Source: Digitec Galaxus

Translation: machine translated
Very good80/100
PC Welt Online Logo
PC Welt OnlineSingle testReleaseJanuary 2026
  • PositiveSmall form factor
  • PositiveMagnetic Magsafe fastening
  • Positivehigh transfer rates
  • NegativeOnly 10 gigabits per second

If you're looking for a high performance SSD that you can attach to the back of your MagSafe device, the EX300U is an affordable (albeit slightly slower) choice for additional storage via USB.

This test report belongs to a different type: EX300U 2TB External SSD (2 TB)