SanDisk Professional 4TB PRO-G40 SSD – Up to 3000MB/s, Thunderbolt 3 (40Gbps), USB-C (10Gbps), IP68 dust/Water Resistance, External Solid State Drive – SDPS31H-004T-GBCND

July 1, 2025


Price: $389.99
(as of Jul 01, 2025 13:17:15 UTC – Details)




Super-fast speeds up to 3000MB/s(1) read and 2500MB/s(1) write with Thunderbolt 3 (40Gbps), capable of moving 50GB in 1 minute or less
Dual-mode compatibility with both Thunderbolt 3 (40Gbps) and USB-C (10Gbps)
Ultra-rugged design with high-level IP68 dust/water resistance, 4000lb crush resistance, and 3m drop resistance (On a carpeted concrete floor.)
Cool aluminum core pulls heat away from the internal drive to help maintain super-fast transfer speeds
Pro-grade enclosure for premium strength you can feel
Drive Format: Mac ready (APFS)

Customers say

Customers praise the SSD’s speed, noting fast boot times and improved system backup performance, while appreciating its build quality as a reliable external drive and its excellent portability. The storage capacity receives positive feedback, with one customer mentioning huge backups take only minutes versus hours. Functionality and connectivity receive mixed reviews – while some say it works well, others report it fails without reason and disconnects frequently. Heat resistance is also mixed, with customers noting it runs warm and never cools below 40 C idle.