Sandisk Optimus GX PRO 850X 4TB NVMe SSD marked down to $839.99 for Prime Big Deal Days

$190 off in Amazon's October Prime Day sale. A 4TB drive gives games, applications, and creative projects room to share one SSD. During Prime Big Deal Days, Prime members can get this Sandisk model with its included heatsink for $839.99.

Sandisk Optimus GX PRO 850X 4TB NVMe SSD drops to $839.99 - save $190.

THE DEAL

Sandisk Optimus GX PRO 850X 4TB NVMe SSD

$839.99 (was $1029.99) - Save $190 (18% off)

WhereAmazon Expires: October 7, 2026 11:59 PM PDT

Get This Price

For just $839.99, below its 30-day average of $1029.99, this drive reaches its lowest price on record. Its 90-day average also sits at $1029.99, while the 180-day average is $1182.52. That puts the current offer below both its recent pricing and its longer-term average.

What You're Getting

• 4TB of storage in an M.2 2280 NVMe drive using PCIe 4.0, with space for games, applications, and creative files.
• Sequential read speeds up to 7,300 MB/s and write speeds up to 6,600 MB/s for this capacity, giving the drive a clear performance focus alongside its storage space.
• An included SANDISK Optimus heatsink with integrated programmable RGB LED, designed to help minimize throttling and maintain peak performance.
• SANDISK BiCS TLC 3D NAND and nCache 4.0 technology, plus support for Microsoft DirectStorage games.
• TCG Opal v2.01 data-at-rest encryption to help protect digital assets stored on the drive.

Who This Is For

This fits gamers who want room for a larger installed library and creators whose projects compete with applications for storage. The combination of 4TB capacity, fast sequential transfers, and an included heatsink makes it relevant to a PC used for both gaming and creative work. Buyers focused on those features have a clearer reason to spend $839.99 than shoppers who simply need somewhere to store a few files.

Final Verdict

Choose this drive if your upgrade calls for 4TB, PCIe 4.0 speeds, and the included RGB heatsink. Get the $839.99 Amazon offer by October 7, 2026 11:59 PM PDT to save $190 against its recent average.