Corsair EX400U 4TB USB4 External SSD: USB4 40Gb, 4000MB/s read, 3600MB/s write, 0°C–70°C, 1,500G shock, Gunmetal, 0.092kg, USB-C, Win/Mac/iOS/Linux | CSSD-EX400U4TB

Corsair EX400U 4TB USB4 External SSD: USB4 40Gb, 4000MB/s read, 3600MB/s write, 0°C–70°C, 1,500G shock, Gunmetal, 0.092kg, USB-C, Win/Mac/iOS/Linux

Leverage the incredibly high bandwidth of USB4 to move large files in seconds, all in a small, portable device.
•High bandwidth 40Gbps USB4 connection
•Up to 4,000MB/sec sequential read and up to 3,600MB/sec sequential write speeds
•Compatible with USB Type-C for PC, Mac, and iOS devices
•High-speed NVMe interface when using USB4 or Thunderbolt
•Connects to iPhone 15 and later models to bolster storage using MagSafe
•Three-year limited warranty

Tech Specs
Heatsink Color GUNMETAL
Storage Temperature -40°C to +85°C
Storage Humidity 93% RH (40° C)
SSD Package Contents EX400U External SSD, USB-C to USB-C cable (30cm, 40Gb)
SSD Compatibility USB Type-C connector, Windows 10, 11, MacOS 13 and later, iOS/iPadOS 13 and later
Vibration 20 Hz~80 Hz/1.52 mm, 80 Hz~2000 Hz/20G
SSD Shock 1,500 G
SSD Operating Temperature 0°C to +70°C
SSD Smart Support No
USB Compatibility Support for Microsoft Windows® 10 and later, Mac OS® 13 and later, iOS/iPadOS 13 and later, and Linux with no driver or software installation necessary | USB Type-C Port required
Unformatted Capacity 4TB
USB Package Contents EX400U External SSD, USB-C to USB-C cable (30cm, 40Gb, 60W Power Delivery capable), USB-C to USB-C cable (7cm, 40Gb, 90 deg connector)
Operating Temperature 0°C to 70°C
Interface USB4
Sequential Read Write Up to 4000MB/s read / 3600MB/s write (USB4 40Gb)
Max Sequential Read ATTO Up to 4000MB/s
Max Sequential Read CDM Up to 4000MB/s
Max Sequential Write CDM up to 3600MB/s
Max Sequential Write ATTO up to 3600MB/s
Weight 0.092kg

Product Last Updated: 11/12/2025

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