MANUAL | QUICK START GUIDE

EX400U and EX400U SURVIVOR

USB4 EXTERNAL SSD

EX400U Portable SSD_Render_03
EX400U SURVIVOR Portable SSD_Render_02 4k
EX400U Portable SSD_Render_03 EX400U SURVIVOR Portable SSD_Render_02 4k

PACKAGE CONTENTS

EX400U

EX300U_PackagingContent_EX400U 01
  1. EX400U
  2. USB Type-C connector
  3. USB-Type C to USB Type-C cable (40Gb, 60W)
  4. USB-Type C to USB Type-C 90-degree Cable (40Gb) 7cm *(in product shipped after October 2025)

EX400U SURVIVOR

EX400U_SURVIVOR_EX400U SURVIVOR_L
  1. USB Type-C connector
  2. USB-Type C to USB Type-C cable (40Gb, 60W)

CONNECTING AND DISCONNECTING THE EX400U

Use the included USB-C to USB-C cable to connect to USB-C or Thunderbolt 4 and 5 hosts. This connection type is required to achieve the optimum performance.

LED STATUS LIGHT

LED blinks for 3s Drive is being initialized for use
LED off Device idle or disconnected
LED blinking Data read or write operation

 

GETTING THE EX400U READY FOR USE

The drive ships ready to use formatted with exFAT, a partition format that works on a variety of operating systems. Should you want to format the drive in another format, please use standard tools from your disk management or utility suite.

USING THE EX400U WITH iPhone

The drive can be attached to the back of your iPhone using MagSafe.

EX300U Portable SSD_Render_13_1a

(EX400U only)


OPTIMIZING PERFORMANCE

The drive will perform at its highest speeds when connected to a USB4 (40Gb) port. It is compatible with Thunderbolt 4 and 5, USB 3.2, 3.0 and 2.0, but may not reach its maximum performance due to the lower bandwidth provided by these ports.

On Windows systems, the following drive policies will ensure optimal performance. These settings are available by right clicking Properties for the storage drive in Windows Device Manager.

  1. Enable performance optimized mode
  2. Enable drive write caching
policy

INSTALLING THE SSD TOOLBOX

Please download the CORSAIR SSD Toolbox 2.0 or later to obtain extended drive information and check for Firmware updates.

Not all functions of the SSD toolbox are available for External Storage. CORSAIR SSD Toolbox is available for Windows systems.

Download link: www.corsair.com/downloads

LEGAL STATEMENT

© 2025 CORSAIR MEMORY, Inc. All rights reserved. CORSAIR and the sails logo are registered trademarks of CORSAIR in the United States and/or other countries. All other trademarks are the property of their respective owners. Product may vary slightly from those pictured.

KC_logo