SanDisk PRO-G40 4TB Portable External SSD (SDPS31H-004T) – Thunderbolt 3 (40Gbps) / USB 3.2 Gen 2, Up to 2,700 MB/s

The SanDisk PRO-G40 4TB (SDPS31H-004T) is a portable solid state drive with Thunderbolt 3 (40Gbps) / USB 3.2 Gen 2 connectivity and up to 2,700 MB/s read and 1,900 MB/s write. Designed for photographers, creators, students and travellers, it carries large files securely and moves them far faster than a portable hard drive.

Carry your files – and move them fast.

Move Big Files Fast, Wherever You Work

Portable hard drives are slow, heavy and vulnerable to drops because they contain spinning platters. Moving a day of 4K footage or a large photo shoot can take a long time, and one fall can cost the data.

The SanDisk PRO-G40 4TB uses flash memory with no moving parts, so it is faster, lighter and more resistant to bumps. Its IP68 dust and water resistance rating adds protection outdoors.

Fast, Simple Connections

Connect over Thunderbolt 3 (40Gbps) / USB 3.2 Gen 2 to laptops, desktops and many tablets and phones. Actual speed depends on your computer’s USB or Thunderbolt port.

Built for Everyday Carry

A compact, solid-state design means no clicking, no spin-up delay and better resistance to drops than portable hard drives.

Setup Instructions

How to Set Up the SanDisk PRO-G40 4TB

1. Connect the SSD to your computer with the included USB Type-C cable.
2. Use it straight away, or reformat to exFAT for both Windows and Mac (or APFS/NTFS for a single platform).
3. Copy files or set up automatic backups with Time Machine, File History or your preferred tool.
4. Eject the drive safely before unplugging it.