WD_BLACK SN770M 1TB M.2 2230 SSD: features, specs and who it suits

The WD_BLACK SN770M is a small NVMe solid state drive in the M.2 2230 format, made for devices where space is tight. Western Digital positions it for handheld gaming PCs such as the Valve Steam Deck and ASUS ROG Ally, and for some compact laptops. This 1TB model (WDBDNH0010BBK-WRSN) is a way to add or replace storage in those devices.

Why M.2 2230 matters

M.2 drives are named by their size. The "2230" means 22 mm wide and 30 mm long, which is much shorter than the 2280 (80 mm) drives found in most desktops and laptops. Handhelds and thin laptops often have only enough room for a 2230 drive, so a standard-length drive simply won't fit. Check which size your device takes before looking at anything else.

Speed and what it means for games

Western Digital rates the SN770M at up to 5,150 MB/s on the 1TB and 2TB models. It uses the NVMe protocol over PCIe, which is far quicker than older SATA drives. The brand says this brings quicker game installs and level loads. Real results depend on the device: many handhelds can't use the drive's full speed, and loading times also depend on the processor and the game itself.

Capacity and flash type

The drive uses TLC 3D NAND, a common type of flash that stores three bits per cell. Western Digital offers the line in sizes up to 2TB. At 1TB, it gives a handheld room for a decent library of modern games, although large titles can take up tens of gigabytes each, so the space fills faster than many people expect.

Compatible devices

The listing names the Valve Steam Deck and ASUS ROG Ally as examples, and says the drive can also revitalise the storage of M.2 2230 compatible laptops such as many Microsoft Surface and Dell models. "Many" is the key word: not every model is compatible, so check your manufacturer's specifications and upgrade instructions.

Warranty and software

Western Digital backs the drive with a 5-year limited warranty. It also offers the Western Digital Dashboard software, which is Windows only, for keeping the drive tuned and monitoring it. Handheld users running a Linux-based system such as SteamOS should note that the Dashboard won't run there.

Fitting it

Replacing the drive usually means opening the device, removing the old SSD and installing the new one. Your device maker normally publishes a guide. You'll then need to reinstall the operating system or clone the old drive's contents. Back up your saves and files first, and follow the manufacturer's steps to avoid damaging internal parts or affecting any warranty terms.

Who it suits

It suits owners of supported handhelds who've outgrown their built-in storage, and people whose thin laptop uses a 2230 slot. It isn't meant for desktop boards or most laptops that take full-length 2280 drives.

What to check before you buy

• Drive length: confirm the slot takes M.2 2230 and not 2280.
• Interface: confirm it supports NVMe over PCIe.
• Compatibility: look up your exact device model in the maker's documentation.
• Capacity: decide how much room your games and files need.
• Tools and skills: have the right screwdriver and a plan to reinstall or clone the system.
• Backups: save your data before swapping drives.

The short version

• 1TB NVMe SSD in the compact M.2 2230 format, with TLC 3D NAND.
• Rated at up to 5,150 MB/s by Western Digital.
• Aimed at the Steam Deck, ROG Ally and compatible 2230 laptops.
• 5-year limited warranty; Dashboard software for Windows.
• Check the slot size and device compatibility first.

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