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Small black circuit board, 22 by 30 millimetres, gold edge connector, chips on one side

SanDisk

SanDisk SN770M 2TB M.2 2230 NVMe internal SSD

SKU CH-VF85-V8KD9

M.2 2230 NVMe SSD with 2TB capacity and PCIe 4.0 speeds up to 5150 MB/s read for handheld gaming devices

  • Total capacity2 TB
  • Sequential read speedUp to 5,150 MB/s
  • Sequential write speedUp to 4,850 MB/s
  • Interface typePCIe® Gen 4.0
  • Form factorM.2 2230
  • Intended useConsumer
  • Sequential reads up to 5150 MBps accelerate game loading
  • Sequential writes up to 4850 MBps speed up large file transfers
  • Random read 650000 IOPS and random write 800000 IOPS boost multitasking responsiveness
  • 1200TB endurance rating supports heavy daily write workloads
  • M.2 2230 form factor fits Steam Deck, ROG Ally and compatible laptops

Compact storage for handhelds

The SN770M is a 2TB M.2 2230 NVMe SSD designed for devices that only accept the shorter 2230 form factor. It fits Steam Deck, ROG Ally and many Surface or Dell laptops without adapters or modifications.

Thermals and power in use

Operating temperature spans 0°C to 85°C with a 2.38mm single-sided profile that leaves room for thin thermal pads. The PCIe 4.0 controller and TLC 3D NAND keep sustained write power modest, so handheld batteries are not drained aggressively during large installs.

Build and daily implications

The drive weighs 2.8g and measures 22mm by 30mm, matching the exact slot dimensions of supported machines. Western Digital Dashboard software on Windows lets owners monitor the 1200TBW endurance rating and apply firmware updates without opening the chassis.

How it compares

Measured against everything we stock in Internal NVMe & SATA SSDs, at today’s prices. Recalculated every night.

Price $282.99
Pricier than about 66% of the 1,994 comparable items (median $180.49).
Total capacity 2 TB
Higher than about 70% of the 1,368 comparable items (median 1 TB).
Sequential read speed Up to 5,150 MB/s
Higher than about 71% of the 1,180 comparable items (median 2,400 MB/s).
Price per TB $141.50 per TB
Cheaper than about 62% of the 1,362 comparable items (median $165.50 per TB).

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Specifications

Product
Brand nameWestern Digital
Product lineSN770M
Model nameWDBDNH0020BBK-WRSN
Total capacity2 TB
Intended useConsumer
Performance
Sequential read speedUp to 5,150 MB/s
Sequential write speedUp to 4,850 MB/s
Random read (4K)Up to 650,000 IOPS
Random write (4K)Up to 800,000 IOPS
Storage
NAND flash type3D NAND TLC
Write endurance1200 TB
Connectivity
Connection protocolNVMe
Ports & slots
Interface typePCIe® Gen 4.0
Size & build
Form factorM.2 2230
Overall height2.38 mm
Overall width22 ± 0.15 mm
Product depth30 ± 0.15 mm
Product weight2.8g ± 0.5g
Environment & compliance
Operating temperature range0 °C to 85 °C
Storage temperature range-40 °C to 85 °C
More details
Mean time to failure1.75 Million Hours

Questions about this item

How do I install the M.2 2230 NVMe drive in a Steam Deck, and what step do people often miss?

Remove the back cover, disconnect the battery, insert the drive at a 30-degree angle into the M.2 2230 slot, secure it with the single screw, reconnect the battery, then reattach the cover; the step most people miss is disconnecting the battery before starting.

What maintenance will the 2TB 3D NAND TLC drive need over its 1200TB TBW life?

No hardware maintenance is required; keep firmware current via the Western Digital Dashboard on Windows and monitor SMART health attributes to track wear against the 1200TB TBW rating.

At what temperature does the PCIe Gen 4.0 NVMe SSD throttle during sustained heavy workloads?

The controller begins thermal throttling when the drive reaches its maximum operating temperature of 85°C to protect the 3D NAND TLC components.

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