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Kingston A400

240 GB · 2.5-inch standalone SATA · SA400S37/240G

A 240 GB SATA SSD in a 7 mm-high 2.5-inch enclosure. The SA400S37 part identifies the standalone SATA drive.

Reviewed 7 Sept 2026Manufacturer specifications, not a hands-on test.

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WHAT IT BRINGS

The useful part.

Fits the specified 100 × 69.9 × 7 mm 2.5-inch envelope and supports SATA 6 Gb/s with SATA 3 Gb/s backward compatibility.

Manufacturer source Manufacturer source

BEFORE YOU CHOOSE

The checks that matter.

Requires compatible SATA data and power connections. Its 240 GB column specifies up to 350 MB/s write, not the 450 MB/s figure advertised for larger capacities.

Manufacturer source Manufacturer source

NOTHING HIDDEN IN THE SMALL PRINT

Every specification.
With its source.

Our publishing standard

Capacity: 240 GB
Conditions & context
Manufacturer specification · Manufacturer-listed capacity; formatting and reserved functions reduce usable storage.
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SSD / HDD: SSD
Conditions & context
Manufacturer specification
Source
Interface and version: SATA Rev. 3.0 (6 Gb/s); backward compatible with SATA Rev. 2.0 (3 Gb/s)
Conditions & context
Manufacturer specification · Match the host interface and available lanes; interface generation is not measured application performance.
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Form factor: 2.5-inch
Conditions & context
Manufacturer specification · Exact part configuration; physical and electrical compatibility both matter.
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Dimensions including heatsink: 100 × 69.9 × 7 mm
Conditions & context
Manufacturer specification · Standalone SATA enclosure. Dimensions apply to this exact capacity/configuration; allow installation clearance.
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Rated performance and conditions: Up to 500 MB/s sequential read; up to 350 MB/s sequential write
Conditions & context
Manufacturer specification · Kingston ATTO data-transfer claims, fresh/out-of-box on a SATA Rev. 3.0 motherboard. Host hardware, software and usage affect results. No sustained post-cache speed or site benchmark is inferred.
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Warranty terms and endurance if applicable: 3-year conditional limited warranty, or SATA SMART attribute 231 (SSD Wear Indicator) reaching a normalized value of 1 in Kingston SSD Manager, whichever occurs first
Conditions & context
Manufacturer specification · Subject to original-purchase eligibility and full manufacturer terms. Published TBW is a separate endurance rating; it is not substituted for the stated wear indicator or used to predict failure.
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Limited warranty time: 3 years
Conditions & context
Manufacturer specification · Maximum time term; coverage can end earlier at SATA SMART attribute 231 (SSD Wear Indicator) reaching a normalized value of 1 in Kingston SSD Manager. Eligibility and full terms apply; no remaining coverage for a used drive is asserted.
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Published endurance rating (TBW): 80 TB
Conditions & context
Manufacturer specification · Published endurance rating derived from the JEDEC Client Workload (JESD219A). Warranty termination uses the stated time/wear conditions, not an assumed identical TBW cutoff. This is not a guaranteed service life or reliability score.
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Drive weight: 41 g
Conditions & context
Manufacturer specification · Manufacturer drive/module weight for the selected capacity; packaging excluded.
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Operating temperature: 0–70 °C
Conditions & context
Manufacturer specification · Manufacturer operating range; not a measured temperature under a particular workload.
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