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Corsair EX400U 1TB USB4 Portable External Type-C SSD – 3.2 Gen2 2x2 Connections, Up to 40Gbps, Plug and Play, MagSafe, Includes Cable – Windows PC, iOS Mac – Gray

Corsair EX400U 1TB USB4 Portable External Type-C SSD

Bottom line: The Corsair EX400U 1TB USB4 Portable External Type-C SSD: Up to 4,000MB/s read and 3,500MB/s write over USB4; main trade-off: peak 40Gbps speeds require a USB4 host, not plain Type-C.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For SSDs and PC storage upgrades, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ Up to 4,000MB/s read and 3,500MB/s write over USB4
  • ✓ Single-cable plug-and-play power plus data on PC or Mac
  • ✓ Works with USB Type-C, Thunderbolt 4 and higher hosts
  • ✓ Compact pocketable shell built for editing on location
  • ✓ CORSAIR SSD Toolbox adds drive monitoring and control

Cons

  • ✗ Peak 40Gbps speeds require a USB4 host, not plain Type-C
  • ✗ Three-year warranty is shorter than five-year rival SSDs
  • ✗ Corsair lists performance as varying by capacity tier

Manufacturer description

The CORSAIR EX400U USB4 External SSD delivers high-bandwidth external SSD storage with up to 4,000MB/sec sequential read and 3,500MB/sec sequential write speeds for any USB4-equipped PC or Mac, all in a compact, portable profile. The EX400U is also compatible with USB Type-C and Thunderbolt 4 and higher systems. With a simple single-cable plug-and-play setup, CORSAIR SSD Toolbox software for in-depth control, and backed by a three-year warranty, the EX400U offers easy-to-use, lightning-fast external storage. Technical Specifications Product Type: USB4 External SSD Interface: 1x USB Type-C…

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SpecPicks Verdict

SpecPicks scored Corsair EX400U 1TB USB4 Portable External Type-C SSD using a rating × review-volume × price-fit model applied to published specs and reviews across the ssds & storage category. Compare with similarly-priced alternatives in the ssds & storage category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for ssds & storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • External SSD with USB4 Connection: Leverage the incredibly high bandwidth of USB4 to move large files for tasks like video and photo editing in seconds.
  • Lightning-Fast Speeds: Delivers data speeds of up to 4,000MB/sec sequential read and up to 3,500MB/sec sequential write.
  • Compatible with USB Type-C: Connect via USB Type-C, Thunderbolt 4 and higher for wide compatibility*. *Performance varies by capacity. Maximum performance requires USB4 or higher connection.
  • Compact Form Factor: Small form factor allows you to take the EX400U with you for high-performance storage on the go.
  • Simple Plug-and-Play Setup: Easy to use right out of the box with a single connection for power and data on PC or Mac.

Full Specifications

BrandCorsair
ColorGray
Model NameEX400U
Read Speed4000 megabytes_per_second
Unit Count1 Count
Form FactorCompact
Media Speed3500 megabytes_per_second
ConnectivityUSB
Model NumberCSSD-EX400U1TB
CompatibilityPC, iOS, Mac
Built-In MediaEX400U External SSD, USB-C to USB-C Cable 0.3m / 1ft (USB4, 60W)
Hard-Drive Size1 TB
Mfr Part NumberCSSD-EX400U1TB
Number of Items1
Special FeatureBackward Compatible
Hardware PlatformMac, PC
Installation TypeExternal Hard Drive
Compatible DevicesDesktop, Laptop
Data Transfer Rate3500 megabytes_per_second
Enclosure MaterialNand Flash
Full listing titleCorsair EX400U 1TB USB4 Portable External Type-C SSD – 3.2 Gen2 2x2 Connections, Up to 40Gbps, Plug and Play, MagSafe, Includes Cable – Windows PC, iOS Mac – Gray

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Corsair EX400U 1TB USB4 Portable External Type-C SSD – 3.2 Gen2 2x2 Connections, Up to 40Gbps, Plug and Play, MagSafe, Includes Cable – Windows PC, iOS Mac – Gray is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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Corsair EX400U 1TB USB4 Portable External Type-C SSD – 3.2 Gen2 2x2 Connections, Up to 40Gbps, Plug and Play, MagSafe, Includes Cable – Windows PC, iOS Mac – Gray
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