Overview

  • 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 3,600MB/sec sequential write.
  • Compatible with USB Type-C
    Connect via USB Type-C, Thunderbolt 4 and higher for wide compatibility*.
  • 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.
  • High-Speed NVMe Interface
    Ensures wide-ranging compatibility and enhanced functionality.
  • Compatible with iOS and MagSafe
    Supports iOS / iPadOS 13 and later devices and can attach to iPhones using the drive’s MagSafe connector.
  • CORSAIR SSD Toolbox Software
    Advanced drive controls from your desktop, including secure erase and firmware updates.
  • Three-Year Limited Warranty
    Ensures peace of mind with industry-leading customer support.

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Specifications

Capacity & configuration

Storage Capacity
2000 gigabytes
Storage Drive Type
SSD
External Hard Drive Type
Portable
Lighting Type
None

Dimensions & weight

Product Name
EX400U USB4 2TB External Portable SSD
Product Height
0.47 inches
Product Width
2.52 inches
Product Weight
0.84 ounces

Features

Brand
CORSAIR
Color
Gray
Maximum Read Speed
4000 megabytes per second
Maximum Write Speed
3600 megabytes per second
Internal Or External
External
Interface(s)
USB-C
Operating System Compatibility
Apple iOS
Data Encryption
No
Usage
Everyday computing
UPC
840440488545

Power & warranty

Model Number
CSSD-EX400U2TB
Power Source
USB port
Warranty - Parts
3 years
Warranty - Labor
3 years

Warranty & protection

Included manufacturer warranty

See manufacturer documentation.

Register your product with the manufacturer within 30 days of delivery.

Warranty service

Manufacturer warranty claims are handled by the manufacturer. We are happy to help you find the right contact: (888) 419-6820.

Customer reviews

Write a review
AndrewSOct 10, 2026 · Verified purchase ★★★★☆

Ingenious design, but the cable needs a fix - This thing is brilliant. It's lightning fast, and the MagSafe magnet makes it so easy to snap onto my phone. The custom cable also makes connecting it super easy. I love it and would recommend it. My one big issue is that the cable seems sized to fit different iPhones. On my Pro, it gets cramped and pushed into a bend, which wears it out over time. They should fix that, but otherwise this is an insanely well-designed product.

rsmed1May 8, 2026 · Verified purchase ★★★★★

Solid Backup Drive - Using this as my backup drive. It's fast and solid.

KrisWMay 1, 2026 · Verified purchase ★★★★★

Small AND mighty! - Lightning fast and multi-functional. I especially appreciate the MagSafe capability that allows me to attach to my phone or my laptop with ease. Lots of memory availability in a tiny package!

cziarnoMar 22, 2026 · Verified purchase ★★★★★

CORSAIR - EX400U USB4 2TB External Portable SSD - Fantastic drive. Fast (over 3 GB a sec), lightweight and comes with 2 cables along with being magnetic to your phone. Highly recommend...

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Questions & answers

Ask a question

Email [email protected] or call (888) 419-6820 during business hours.

Free U.S. shippingOn every order. Leaves our store in 1–2 business days, arrives in 3–5 business days.
Free returns for 30 daysNo restocking fee. We email you a prepaid return label.
We can install it tooOptional in-home delivery, installation and haul-away on large appliances.
Talk to our team(888) 419-6820 · Mon–Sat