Corsair EX400U 2TB USB4 Portable External SSD - Fast Portable Storage

In this review the Corsair EX400U 2TB USB4 external SSD is evaluated as a compact, high-bandwidth drive aimed at content creators and power users who need fast on-the-go storage. The single biggest reason to buy is its sustained transfer speeds up to 4,000MB/s read and 3,600MB/s write, which can cut file transfer and project offload times dramatically when used with a USB4 or Thunderbolt 4 host. The drive is plug-and-play on modern Windows and Mac systems and includes a 40Gbps cable for immediate use.

Key Features

• USB4 connection: Leverages the high bandwidth of USB4 to move large media files quickly for editing and backups.
• High sequential speed: Up to 4,000MB/s read and 3,600MB/s write for faster project transfers and responsiveness with large files.
• Wide compatibility: Connects via USB Type-C and is compatible with Thunderbolt 4 and higher for broad system support.
• Compact form factor: Small and portable design makes it easy to carry between studios or job sites without sacrificing performance.
• Plug-and-play setup: Single-cable operation for power and data simplifies use on both PC and Mac without extra power bricks.
• Included software and warranty: Works with CORSAIR SSD Toolbox for drive control and is backed by a three-year warranty for basic peace of mind.

Who It's For

The EX400U is best for photographers, video editors, and power users who regularly move multi-gigabyte files and want near-internal-drive speeds from a portable device. If a workflow depends on fast sequential transfers or editing directly from external media, the strong read and write speeds make this a sensible choice.

Users who only need occasional file backups to a basic USB drive, or those with older USB 2.0/3.0-only systems that cannot reach the higher throughput, should consider lower-cost external SSDs; maximum performance requires a USB4 or Thunderbolt 4 connection.

Pros & Cons

Pros

• Very fast sequential read and write speeds for large file transfers and editing.
• Compact and lightweight for easy transport between devices.
• Includes a 40Gbps cable and supports USB Type-C and Thunderbolt 4 compatibility.
• Low heat generation during normal use and includes CORSAIR SSD Toolbox for management.

Cons

• Top speeds require a USB4 or Thunderbolt 4 host; performance is reduced on older USB ports.
• Some users report mixed functionality and isolated durability concerns under heavy or edge-case workloads.

Specifications

Our Verdict

The Corsair EX400U 2TB is a strong choice for users who need fast external storage on the go; its high sequential speeds and USB4 compatibility deliver near-internal performance for large files and editing workflows. It represents good value for anyone with a USB4 or Thunderbolt 4 system, while those on older ports should temper expectations because maximum performance requires the newer host connection.

Frequently Asked Questions

Will this reach its top speeds on any USB-C port?
Top speeds require a USB4 (40Gb) or Thunderbolt 4 host; performance will be lower on USB 3.2 or USB 3.0 ports.

Is the drive ready to use out of the box?
Yes, it is plug-and-play for Windows PC and Mac systems and includes a 40Gbps cable for immediate connection.

Does it come with software and warranty?
Yes, CORSAIR SSD Toolbox is available for drive management and the unit includes a three-year warranty.