Western Digital WD Black SN770M NVMe Internal SSD (M.2 2230)

Capacity

Price

$248.75

Per TB$248.75

AmazonBuy on Amazon

Also available at

Reasons to buy

  • PCIe Gen4 NVMe with up to 5,150 MB/s sequential read on 1TB and 2TB models per Western Digital documentation.
  • M.2 2230 footprint fits Steam Deck, ROG Ally, and other compact hosts that reject standard 2280 modules.
  • TLC 3D NAND with nCache 4.0 and Microsoft DirectStorage support for supported Windows game loads.
  • Published endurance of 600 TBW at 1TB and 1,200 TBW at 2TB on the official SN770M data sheet.
  • Five-year limited warranty plus SanDisk Dashboard health monitoring on Windows hosts.

Reasons to avoid

  • 2230 NVMe modules typically cost far more per terabyte than common M.2 2280 gaming SSDs.
  • Random read IOPS fall from 740K on 1TB to 650K on 2TB in Western Digital published tables.
  • Handheld installs can run warm during large Steam or Xbox PC game transfers without extra cooling.
  • Physical length is fixed at 30 mm, so it will not fit desktops or laptops that only accept 2280 or longer drives.
Western Digital WD Black SN770M NVMe Internal SSD (M.2 2230) (1 TB) — product photo
1 TB

Specifications

endurance tbw
600
sequential read mbps
5150
sequential write mbps
4900

Researched and maintained by Hard Drive Prices Editorial Team. · Updated June 5, 2026

User ratings

  • Best Buy
    4.8(154)
  • Amazon
    4.7(775)

What you're getting

The WD Black SN770M is a compact M.2 2230 NVMe solid-state drive aimed at handheld gaming PCs and laptops that only accept 30 mm modules. Western Digital positions it for devices like the Valve Steam Deck and ASUS ROG Ally, where a full-length 2280 drive will not fit in the factory slot.

These listings cover the 1TB and 2TB capacities on a PCIe 4.0 x4 link. Western Digital publishes sequential reads up to 5,150 MB/s on both sizes, with writes up to 4,900 MB/s on 1TB and 4,850 MB/s on 2TB. The family uses SanDisk TLC 3D NAND with nCache 4.0 caching and advertises Microsoft DirectStorage support for compatible Windows titles.

Endurance is rated in terabytes written (TBW) at 600 TBW for 1TB and 1,200 TBW for 2TB on the official specification sheet. Warranty coverage runs five years or until the rated TBW limit is reached, whichever comes first, under SanDisk and Western Digital documentation.

Host compatibility still matters in practice. The module needs an M.2 M-key socket that accepts the 2230 footprint and ideally PCIe Gen4 routing to reach published peaks. The drive is backward compatible with PCIe Gen3 slots, but bandwidth and thermals in a handheld shell will cap real-world results below brochure numbers.

Buying context

Typical value (not live pricing)

At research time the Amazon listings referenced here showed about $248.75 for 1TB and $399 for 2TB, while Best Buy and Micro Center often posted lower street prices on the same SKUs. M.2 2230 drives carry a specialty premium versus 2280 NVMe, so compare $/TB against both 2230 rivals and larger-form-factor options only if your device can fit them. Re-check the live cart before checkout because handheld SSD pricing moves quickly.

Where this line often shows up

  • Valve Steam Deck 1TB or 2TB internal storage upgrades
  • ASUS ROG Ally and other Windows handheld PCs with 2230 bays
  • Microsoft Surface or Dell ultrabooks that specify M.2 2230 modules
  • Portable DirectStorage-capable game libraries on PCIe Gen4 handhelds
  • Secondary NVMe slot upgrades where only a 30 mm module clears the chassis

Features

  • M.2 2230 NVMe: Single-sided module measuring about 30 mm by 22 mm for handheld and ultraportable M.2 slots.

  • PCIe Gen4 x4: NVMe interface with backward compatibility to PCIe Gen3 when the host lacks Gen4 lanes.

  • Gaming-oriented firmware stack: nCache 4.0 caching and DirectStorage support on supported Windows builds.

  • Handheld compatibility: Western Digital markets the line for Steam Deck, ROG Ally, and 2230-capable Surface and Dell systems.

  • SanDisk TLC NAND: Built on TLC 3D NAND manufactured under the SanDisk flash license for WD Black retail boxes.

  • SanDisk Dashboard: Windows utility for firmware checks, health stats, and optimization on supported PCs.