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Kingston 120GB A400 vs Kingston 240GB A400 Comparison

Comparison

Kingston 120GB A400 vs Kingston 240GB A400 Comparison

The Kingston 120GB A400 and 240GB A400 are closely related 2.5-inch SATA SSD upgrades with the same stated headline read and write speeds. The 240GB model is the better overall pick for most buyers because it doubles capacity and leads in reliability, value, and customer satisfaction, while the 120GB drive suits a lean operating-system-focused upgrade.

Expert tested Data driven Unbiased reviews Updated 2 August 2026
Kingston 120GB A400 SATA 3 2.5-inch Internal SSD

#1 Overall Winner

Kingston 120GB A400 SATA 3 2.5-inch Internal SSD

85/100
  • Up to 500MB/s read and 450MB/s write speeds are specified.
View review
Kingston 240GB A400 SATA 3 2.5-inch Internal SSD

Contender

Kingston 240GB A400 SATA 3 2.5-inch Internal SSD

92/100
  • 240GB provides twice the stated capacity of the 120GB model.
View review

Quick verdict

Choose the 240GB A400 for the better all-round balance of space, reliability, value, and customer feedback. Choose the 120GB A400 when your compatible system only needs an operating system and a small set of essential applications.

Overall winner

Depends on your needs

At-a-glance comparison

Feature Kingston 120GB A400 SATA 3 2.5-inch Internal SSD Kingston 240GB A400 SATA 3 2.5-inch Internal SSD Winner
Capacity 120GB 240GB Kingston 240GB A400 SATA 3 2.5-inch Internal SSD
Read speed Up to 500MB/s Up to 500MB/s Tie
Write speed Up to 450MB/s Up to 450MB/s Tie
Overall assessment 85 overall score 92 overall score Kingston 240GB A400 SATA 3 2.5-inch Internal SSD
Reliability 72 score 89 score Kingston 240GB A400 SATA 3 2.5-inch Internal SSD
Usability 92 score 88 score Kingston 120GB A400 SATA 3 2.5-inch Internal SSD
Compatibility 84 score 68 score Kingston 120GB A400 SATA 3 2.5-inch Internal SSD
Setup 93 score 90 score Kingston 120GB A400 SATA 3 2.5-inch Internal SSD
Value 90 score 93 score Kingston 240GB A400 SATA 3 2.5-inch Internal SSD
Customer satisfaction 4.7/5 from 28,572 reviews 4.8/5 from 204,504 reviews Kingston 240GB A400 SATA 3 2.5-inch Internal SSD
Console listing Not stated Xbox One and PlayStation 4 listed Kingston 240GB A400 SATA 3 2.5-inch Internal SSD

Detailed comparison

Performance

Both A400 models are specified at up to 500MB/s read and 450MB/s write, so there is no stated peak-speed separation. Both sets of feedback emphasize faster startup, application loading, and general responsiveness after replacing an HDD. The 240GB model receives the higher performance score, while the 120GB version also performs strongly and is well suited to an OS-focused upgrade. Neither listing positions these SATA drives as a substitute for higher-tier PCIe storage.

Speed

The two drives tie on the provided speed score and on their stated maximum read and write figures. Reviews for both capacities report quicker booting, loading, and file-related responsiveness than HDDs. The 240GB version has a slightly higher performance score, but the supplied speed data does not show a direct maximum-transfer-rate advantage.

Reliability

The 240GB A400 is the clearer choice for reliability based on the supplied score data. It scores 89 versus 72 for the 120GB drive, and its review overview is broadly positive about reliable operation. The 120GB model has many successful-use reports, including some long-term feedback, but its aggregate overview also records reports of failure within less than six months.

Kingston 120GB A400 SATA 3 2.5-inch Internal SSD

Pros

  • Up to 500MB/s read and 450MB/s write speeds are specified.
  • Provides a substantial responsiveness upgrade over a mechanical hard drive.
  • Strong ease-of-use and setup scores, supported by reports of straightforward installation.
  • Compact 2.5-inch SATA format suits compatible desktops and laptops.
  • 120GB capacity can work well as a focused operating-system drive.
  • High customer satisfaction from 28,572 reviews.

Cons

  • 120GB is limited for users who need to store many games, applications, or media files.
  • Some customer feedback reports drive failure within less than six months.
  • The listing is for the drive only, with no screws or cables mentioned in the package.
  • It is a SATA SSD, so it is not positioned as a premium PCIe SSD alternative.
Kingston 120GB A400 SATA 3 2.5-inch Internal SSD

Kingston 240GB A400 SATA 3 2.5-inch Internal SSD

Pros

  • 240GB provides twice the stated capacity of the 120GB model.
  • Shares the stated up-to-500MB/s read and 450MB/s write performance.
  • Higher overall, reliability, durability, value, and customer-satisfaction scores.
  • Large review base with consistently positive feedback about boot and loading improvements.
  • 2.5-inch SATA design is intended for compatible desktops and laptops.
  • Listed compatibility includes PlayStation 4 and Xbox One.

Cons

  • 240GB remains modest storage for large game libraries or extensive local media.
  • Some customers report that their computer did not recognize the drive.
  • Cloning software is explicitly not included.
  • Its SATA interface limits it to the capabilities of compatible SATA systems.
Kingston 240GB A400 SATA 3 2.5-inch Internal SSD

Final verdict

The Kingston 240GB A400 is the best overall choice in this comparison. It retains the same stated up-to-500MB/s read and 450MB/s write specifications as the 120GB model while doubling storage capacity. More importantly, it has higher supplied scores for overall quality, performance, reliability, durability, value, and customer satisfaction, backed by a much larger review base.

The 120GB A400 is still a credible alternative for a narrow use case: upgrading an older compatible computer with a small operating-system drive. Its high usability, setup, connectivity, and compatibility scores make it practical when local storage needs are minimal. For most buyers, though, 240GB gives more useful room and better long-term confidence without sacrificing the core SATA SSD experience. Verify physical SATA compatibility and arrange any required installation or migration accessories before ordering.

Overall winner

Depends on your needs

Frequently asked questions

Which is better overall: the Kingston 120GB A400 or 240GB A400?

The Kingston 240GB A400 is the stronger overall option based on the supplied scores. It leads on overall score, performance, reliability, durability, value, and customer satisfaction, while also providing twice the storage. The 120GB version remains a sensible choice when a small operating-system drive is sufficient and its stronger usability and compatibility scores matter more.

Do the Kingston 120GB and 240GB A400 have different speeds?

Not from the stated headline specifications. Both listings claim up to 500MB/s read and 450MB/s write performance, and both receive the same speed score. The practical distinction is storage capacity rather than a stated maximum-speed advantage for either drive.

Is 120GB enough for the Kingston A400 SSD?

It can be enough for an operating system, essential software, and users who keep most files in the cloud or elsewhere. However, the supplied data identifies the 120GB capacity as its main limitation. Buyers planning to keep more applications, games, photos, or local files should favor the 240GB A400.

Which Kingston A400 is better for upgrading an old laptop?

Both are intended to replace a compatible 2.5-inch SATA hard drive and have customer feedback describing noticeably faster boot and loading times. Choose the 120GB drive for a minimal, focused upgrade; choose the 240GB drive if the older laptop needs more practical room for the operating system, programs, and files.

Which A400 model is more reliable according to the supplied data?

The 240GB A400 has the higher reliability score, 89 versus 72, and its aggregate feedback emphasizes reliable operation. The 120GB model also has many positive reports, but its overview notes some reports of failure in less than six months. Individual experiences can still vary with either drive.

Are these Kingston A400 SSDs easy to install?

Both drives score strongly for setup and are 2.5-inch internal SATA models for compatible desktops and laptops. Reviews describe quick Windows installation and straightforward hard-drive replacements. Before ordering, confirm that your device has a compatible SATA bay and obtain any required mounting hardware, cables, or cloning tools separately if needed.

Which A400 SSD offers better value?

The 240GB A400 has the higher provided value score and combines its larger capacity with stronger overall reliability and satisfaction results. The 120GB model can still offer good value for a narrowly defined boot-drive upgrade, especially when its smaller capacity matches the buyer's actual storage requirements.

Can the Kingston 240GB A400 be used in a game console?

The 240GB listing specifically names Microsoft Xbox One and Sony PlayStation 4 among compatible console models. Confirm the storage and installation requirements of the particular console before buying. The 120GB listing does not provide equivalent console compatibility information.

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