This article covers WDS200T2B0C [WD Blue SN550 NVMe SSD（2TB M.2(2280) PCIe Gen3 x4 NVMe 900TBW 5年保証）].

Overview

Western Digital's WD Blue SN550 NVMe SSD delivers a cost-effective 2TB storage solution for mainstream users. This M.2 2280 drive uses a PCIe Gen3 x4 interface and achieves sequential read speeds of up to 2,400 MB/s and write speeds of up to 1,950 MB/s. It offers a solid balance of capacity and performance for everyday computing, including game loading and OS booting. The SN550 series positions itself as an entry-level NVMe SSD with reliable NAND from SanDisk. The 2TB model (WDS200T2B0C) features a DRAM-less architecture with Host Memory Buffer (HMB) technology, which efficiently uses system RAM to maintain good random performance. It comes with a 5-year warranty and a rated endurance of 900TBW.

Compatibility Guide

This SSD uses the M.2 2280 form factor with M-key connector and NVMe 1.3 protocol. It is compatible with any motherboard or laptop that has an M.2 slot supporting PCIe Gen3 x4 or higher (backward compatible with Gen4/5 slots). No special socket or memory restrictions – works with all modern platforms (Intel LGA1200/1700/1851, AMD AM4/AM5, etc.). Some older motherboards may require a BIOS update to support NVMe boot. Check your motherboard's compatibility list. * Power draw is very low (less than 3.5W typical), making it ideal for laptops and low-power builds. No extra power cable is needed.

Product Info

The WD Blue SN550 2TB (model WDS200T2B0C) was launched in 2020 as a budget-friendly NVMe SSD. Its street price in Japan is around ¥67,000 (as of May 2026), which is competitive for a 2TB NVMe drive. Key specifications: Controller: Western Digital (SanDisk) in-house design NAND: SanDisk 3D TLC NAND DRAM: None (HMB only) Warranty: 5 years (with product registration) * Availability: , major electronics retailers, and PC parts stores

Best Use Cases

Budget-conscious PC builders – Ideal for adding large-capacity NVMe storage without breaking the bank. Perfect for game libraries, movie archives, and general system acceleration. Laptop upgrades – Low power consumption and low heat make the SN550 suitable for upgrading the internal SSD in compatible laptops (check for single-sided build in ultra-thin models). Secondary bulk storage – If you already have a high-end OS drive, this SSD serves well as a secondary drive for large files and applications that don't require extreme sequential write speeds.

Things to Consider

The DRAM-less design means sustained write speeds drop after the SLC cache fills. If you frequently copy multi-gigabyte files or use heavy video editing, consider a DRAM-equipped SSD like the WD Black SN770 or Samsung 980 Pro. It is a Gen3 drive – while backward compatible, you won't get Gen4 speeds even on a Gen4 motherboard. For most users, the difference in real-world tasks is minor. Competitors like the Crucial P3 Plus (Gen4) or Samsung 980 (Gen3) offer similar performance. The SN550's value lies in its low price per GB and solid reliability. * TBW rating of 900TB translates to about 2.5 years under a constant 1TB/day write workload. For typical home use (10-50GB per day), the drive will last many years.

Product Disclosure (Amazon)

  • Manufacturer: ウエスタンデジタル(Western Digital)
  • Seller: TMグッドプライスマート
  • Fulfilled by: TMグッドプライスマート
  • ASIN: B08K4NP5DQ
  • Note: This article covers a manufacturer-made product based on Amazon listing details.