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WD Blue SA510 4TB 2.5-inch SATA SSD (WDS400T3B0A): specs and who it suits
A 4TB 2.5-inch, 7mm SATA III solid-state drive from Western Digital with reads up to 560MB/s and writes up to 520MB/s. What the specs mean.
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The WD Blue SA510 4TB (model WDS400T3B0A) is a 2.5-inch SATA solid-state drive. It suits people who want to add a lot of fast storage to an existing laptop or desktop without replacing the machine. Western Digital says it helps with boot times, lag and file transfers compared with a traditional hard drive.
What SATA III means for speed
SATA III is the 6Gb/s interface found in most computers made over the past decade, which is why this drive works in so many older systems. The listing gives sequential read speeds up to 560MB/s and write speeds up to 520MB/s. These sit close to what the SATA III connection allows, so they are typical for SATA SSDs. They are faster than a hard drive for loading programs and opening files, but slower than NVMe SSDs, which use faster connections.
Sequential speeds describe large, continuous file transfers. Day-to-day use involves many small reads, where an SSD's lack of moving parts gives it the biggest advantage over a hard drive.
4TB of capacity
Four terabytes is a lot for a solid-state drive, enough for a large photo and video library, several game installs or project archives. It can serve as a single main drive or as a second drive for bulk files.
The 2.5-inch, 7mm form factor
The drive is 2.5 inches wide and 7mm thick, the usual size for laptop drives. It measures about 3.9 x 2.8 x 0.3 inches (100 x 70 x 7 mm) and weighs very little. Because 2.5-inch is the standard format, it fits most laptop drive bays, many mini PCs and consoles, and desktop cases using a 2.5-inch bracket or an adapter. The description says the SA510 range is also available as an M.2 card, but this listing is the 2.5-inch model.
Who it is aimed at
Western Digital describes the SA510 as designed for professionals, creatives, freelancers and content creators who want to speed up an existing PC. That means an upgrade for editing, file transfers and everyday multitasking, rather than a new computer.
Software
The brand's description mentions Acronis True Image for Western Digital, backup and cyber-protection software. Its availability, the licence terms and any time limits are set by Western Digital, so check the current terms on its website.
Who it suits
It suits owners of older laptops and desktops that only have SATA, people replacing a hard drive, and anyone who needs a large, quiet, shock-resistant drive. It is less suited to heavy, sustained workloads where NVMe speeds matter.
What to check before you buy
- Connection type: confirm your device uses a 2.5-inch SATA bay, not an M.2 slot.
- Thickness: 7mm fits nearly all bays, but check yours.
- Cables and brackets: desktops may need a SATA data cable, SATA power and a mounting bracket.
- Data migration: plan a clone or reinstall, and back up first.
- Operating system support: check that your system detects drives of this size.
- Warranty terms: check the details with the brand.
The short version
- A 4TB, 2.5-inch, 7mm SATA III SSD.
- Sequential reads up to 560MB/s and writes up to 520MB/s.
- Suitable for upgrading laptops and desktops with SATA connections.
- Backup software mentioned by the brand, subject to its terms.
- Not an NVMe drive, so it uses the slower SATA interface.
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