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SSD / NVME · VERIFIED EXACT NVME MODEL

WD_BLACK
SN850X 4 TB

The 4TB model is mainly justified by capacity and 2,400 TBW. Compare cost per TB and the exact bare or heatsink SKU.

Reference: Verified exact modelCapacity: 4 TBMPN: WDS400T2X0EInterface: PCIe 4.0 x4 NVMeFormat: M.2 2280NAND: SanDisk TLC 3D NAND
WD_BLACK SN850X 4 TB — WDS400T2X0E
MODEL PHOTOExact model shown
Best forVery large game libraries and Gen4 systems wanting capacity plus endurance.
Also strongA listing that exactly matches part number WDS400T2X0E.
Main limitBudgets where cheaper drives or 2TB is sufficient.
Check firstConfirm capacity and the bare or heatsink version before comparing price.
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VERIFIED MANUFACTURER NVME SHEET

Exact facts and buying decision

Confirmed facts

  • Capacity: 4 TB
  • MPN: WDS400T2X0E
  • Interface: PCIe 4.0 x4 NVMe
  • Format: M.2 2280
  • NAND: SanDisk TLC 3D NAND
  • Sequential read: Up to 7,300 MB/s
  • Sequential write: Up to 6,600 MB/s
  • Endurance: 2,400 TBW
  • Warranty: 5 years
  • Thermal check: No-heatsink SKU; heatsink version is separate

Decision limit

Budgets where cheaper drives or 2TB is sufficient.

The 4TB model is mainly justified by capacity and 2,400 TBW. Compare cost per TB and the exact bare or heatsink SKU.

Official manufacturer sources · checked August 19, 2026Official source 1 →Official source 2 →

Other useful details

Capacity-specific facts and the manufacturer part number are separated from family maximums.

FAQ

Questions before buying this exact SSD

Who is the WD_BLACK SN850X 4 TB — WDS400T2X0E best for?

Very large game libraries and Gen4 systems wanting capacity plus endurance.

Who should choose a different SSD?

Budgets where cheaper drives or 2TB is sufficient.

What should be checked before buying?

The 4TB model is mainly justified by capacity and 2,400 TBW. Compare cost per TB and the exact bare or heatsink SKU.

A question about this product?

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Questions about the SN850X 4 TB — WDS400T2X0E

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