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Western Digital 120GB WD Green Internal PC SSD Solid State Drive - SATA III 6 Gb/s, 2.5"/7mm, Up to 550 MB/s - WDS120G2G0A
Western Digital

Western Digital 120GB WD Green Internal PC SSD Solid State Drive (WDS120G2G0A)

Bottom line: The Western Digital 120GB WD Green Internal PC SSD Solid State Drive ($49.95 on Amazon as of 2026-10-21 08:15 UTC): SATA III 6 Gb/s reads up to 550 MB/s, near the interface ceiling; main trade-off: 120GB fills fast: Windows plus a few apps, no room for a game library. Another in-stock pick with the same 120GB SATA: the Kingston Digital 120GB SSDNow V300 SATA 3 2.5, $66.99 on Amazon as of (price may vary).

$49.95

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Buy on Amazon — $49.95 Compare to similar ssds & storage

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For SSDs and PC storage upgrades, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ SATA III 6 Gb/s reads up to 550 MB/s, near the interface ceiling
  • ✓ Standard 2.5-inch 7mm body fits nearly any laptop bay or desktop caddy
  • ✓ 3-year limited warranty plus free WD SSD Dashboard health monitoring

Cons

  • ✗ 120GB fills fast: Windows plus a few apps, no room for a game library
  • ✗ SATA III caps throughput far below any NVMe drive in the same price range
  • ✗ Western Digital publishes no sequential write speed, only the 550 MB/s read
  • ✗ SLC cache is small at this capacity, so long file copies can slow down

Manufacturer description

The WD Green 120GB is Western Digital's entry-level SATA SSD, built for the simplest and most common upgrade there is: replacing a slow mechanical hard drive in an older laptop or budget desktop. It uses a standard 2.5-inch, 7mm form factor over SATA III 6 Gb/s, so it drops into virtually any bay or caddy without adapters, and reads run up to 550 MB/s. SLC caching absorbs short bursts of write activity, which is what you actually feel when booting Windows, opening a browser, or launching an application. Western Digital rates the drive as shock-resistant and puts it through WD F.I.T. Lab…

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SpecPicks Verdict

SpecPicks scored Western Digital 120GB WD Green Internal PC SSD Solid State Drive using a rating × review-volume × price-fit model applied to published specs and reviews across the ssds & storage category. Western Digital's ssds & storage lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for ssds & storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Will this fit in my laptop?

It is a standard 2.5-inch drive at 7mm thickness, which is the size nearly every laptop drive bay and desktop caddy accepts. Check that your laptop uses a 2.5-inch SATA bay rather than an M.2 slot before ordering.

Is 120GB enough storage?

It is enough for Windows, drivers, a browser and a handful of applications, which makes it a solid boot drive. It is not enough for a modern game library or large photo and video archives, so plan to keep bulk files on a second drive.

How fast is it compared to a hard drive?

Western Digital rates it at up to 550 MB/s reads over SATA III 6 Gb/s, roughly five times a typical laptop hard drive. SLC caching boosts write performance for everyday tasks like boots and app launches.

What warranty does the WD Green SSD come with?

Western Digital includes a 3-year limited warranty. Registering the drive and running the free WD SSD Dashboard lets you monitor drive health and firmware over that period. Check the product listing for current terms in your region.

Does it come with cloning software to move my old drive over?

Western Digital provides the free downloadable WD SSD Dashboard for monitoring and firmware updates. It does not list bundled cloning software or a mounting bracket, so confirm what is in the box on the product listing before you order.

Key Features

  • SLC (single-level cell) caching boosts write performance to quickly perform everyday tasks
  • Shock-resistant and WD F.I.T. Lab certified for compatibility and reliability
  • Ultra low power-draw so you can use your laptop PC for longer periods of time
  • Includes a 3-year limited warranty so upgrading your storage is worry-free
  • The free, downloadable WD SSD Dashboard* lets you easily monitor the status of your drive

Full Specifications

BrandWestern Digital
ColorMulticolor
Model NameWDS120G2G0A
Read Speed545 megabytes_per_second
Form Factor2.5-inch
Media Speed550 megabits_per_second
Model NumberWDS120G2G0A
CompatibilityPC
Built-In MediaInternal SSD
Hard-Drive Size120 GB
Mfr Part NumberWDS120G2G0A
Number of Items1
Special FeatureShock Resistant
Hardware PlatformMac, PC
Installation TypeInternal Hard Drive
Compatible DevicesSATA III / laptop and desktop PCs,
Data Transfer Rate545 megabytes_per_second
Enclosure MaterialSolid State Material
Additional FeaturesShock Resistant
Hard Disk InterfaceSATA 6 GB/s
Full listing titleWestern Digital 120GB WD Green Internal PC SSD Solid State Drive - SATA III 6 Gb/s, 2.5"/7mm, Up to 550 MB/s - WDS120G2G0A

Ready to buy?

Western Digital 120GB WD Green Internal PC SSD Solid State Drive - SATA III 6 Gb/s, 2.5"/7mm, Up to 550 MB/s - WDS120G2G0A is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $49.95

*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.

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Western Digital 120GB WD Green Internal PC SSD Solid State Drive - SATA III 6 Gb/s, 2.5"/7mm, Up to 550 MB/s - WDS120G2G0A
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