#1 Overall Winner
Kingston 120GB A400 SATA 3 2.5-inch Internal SSD
- Up to 500MB/s read and 450MB/s write speeds are specified.
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.
#1 Overall Winner
Contender
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
| 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 |
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.
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.
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.
The 120GB A400 holds a modest usability-score advantage. Its reviews describe easy installation and fast migration results, while the 240GB model is likewise frequently described as straightforward to fit and use. For day-to-day ownership, the 240GB version may be more convenient because its extra storage reduces the need to manage space as closely.
Both products are 2.5-inch internal SATA SSDs designed for compact installation in compatible computers. The 120GB version has the higher design score, but the information supplied does not identify a major form-factor or ergonomic difference. Storage capacity, rather than physical design, should drive the choice.
Both drives share a solid-state design with no moving parts, which the listings present as quieter, cooler, and more resistant to shock and vibration than a mechanical hard drive. Their supplied build-quality scores are identical. The provided data does not establish a meaningful construction advantage for either capacity.
Both SSDs avoid moving parts and are described as shock- and vibration-resistant compared with HDDs. The 240GB A400 has the stronger durability score, 84 versus 71. Its reviews include reports of continued operation over years, whereas the 120GB drive's supplied feedback is more mixed due to early-failure reports.
Both are lightweight, compact internal 2.5-inch SSDs without moving parts, making them suitable for laptops as well as desktops. The 240GB drive has the higher portability score, although neither is a portable external drive by itself. In practice, they are equally easy to carry only once installed in a compatible device or enclosure.
Feature differences are limited because both drives are Kingston A400 2.5-inch SATA SSDs with flash memory, no moving parts, and backward compatibility to SATA Rev. 2.0. The meaningful distinction is capacity: 240GB versus 120GB. The 240GB listing also names Xbox One and PlayStation 4 compatibility, while its product description explicitly says cloning software is not included.
Both products are strong setup options for a compatible SATA system, with reviews describing quick Windows installations and uncomplicated HDD replacements. The 120GB A400 has a narrow setup-score lead. The 240GB listing explicitly excludes cloning software, so buyers migrating an existing installation should arrange their own migration method. The 120GB package feedback also notes that screws and cables are not included.
Both drives are intended for compatible desktops and laptops using a 2.5-inch SATA drive. The 120GB model has the higher compatibility score. However, the 240GB listing specifically includes Xbox One and PlayStation 4, which may matter for those particular use cases. Compatibility should be verified against the target device because some 240GB reviews mention that a computer did not recognize the drive.
Both drives use SATA connectivity and are described as backward compatible with SATA Rev. 2.0. The 120GB model receives the higher connectivity score and lists SATA 6.0Gb/s hardware connectivity, while the 240GB listing gives SATA 3.0Gb/s hardware connectivity. Because the product descriptions state the same up-to-500MB/s read and 450MB/s write figures, buyers should prioritize their system's physical 2.5-inch SATA compatibility rather than assume a real-world advantage from those listing labels.
Both products are described as cooler and quieter than mechanical hard drives, and their solid-state design has no moving parts. The 240GB A400 has the higher supplied power-efficiency score. The provided data does not include measured power draw or battery-runtime testing, so this comparison should not be treated as a quantified battery-life result.
The 240GB A400 earns the higher value score because it combines more storage with stronger overall, reliability, durability, and satisfaction results. That does not make the 120GB model poor value: it has a strong value score and can be a sensible purchase where 120GB is genuinely enough. The better choice depends on whether avoiding storage constraints is worth selecting the larger capacity.
Both products are Kingston A400 SSDs, so there is no brand-level advantage in this comparison. They receive the same brand-trust score. Buyer confidence should instead be guided by the capacity required, the supplied reliability results, seller conditions, and compatibility with the intended system.
The 240GB A400 leads in customer satisfaction, with a 4.8/5 rating from 204,504 reviews compared with 4.7/5 from 28,572 reviews for the 120GB model. Both products receive repeated praise for straightforward installation and noticeable HDD-to-SSD speed improvements. The 120GB feedback includes some early-failure concerns, while the 240GB overview notes mixed recognition experiences on some computers.
The provided warranty-support scores are identical, and no specific warranty duration, return policy, or support terms are supplied for either model. There is no evidence here to declare a winner. Buyers should confirm the applicable seller, regional warranty coverage, and return process before purchase.
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
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.
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.
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.
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.
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.
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.
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.
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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