This article covers WD Red SA500 NAS SSD SATA 6G 4TB 5年保証.

Overview

The WD Red SA500 NAS SSD (model WDS400T1R0A) is a 2.5-inch SATA internal SSD tailored for NAS environments. It offers 4TB of capacity with a 7mm thickness, making it compatible with a wide range of desktops, laptops, and NAS enclosures. Rated at 2500TBW and backed by a 5-year warranty, this drive emphasizes endurance and reliability over raw speed. Positioned as a mid-range to high-end NAS SSD, the Red SA500 is designed for 24/7 operation. It uses a SATA 6Gb/s interface, which limits sequential speeds to around 550 MB/s, but that's more than adequate for file serving and media streaming. The focus here is on consistent performance under continuous load.

Compatibility Guide

This drive follows the standard 2.5-inch SATA form factor. It fits into any desktop or laptop with an available SATA port and a 2.5-inch drive bay. For NAS use, check the manufacturer's compatibility list; QNAP, Synology, and ASUSTOR commonly support this model. Form factor: 2.5 inch, 7mm thick Interface: SATA 6Gb/s Power: SATA power connector (5V) OS support: Windows, macOS, Linux If you plan to use it in a RAID array, verify that your RAID controller supports TRIM passthrough for optimal long-term performance. Also ensure you have enough free SATA ports on your motherboard or NAS.

Product Info

Launched in 2019, the WD Red SA500 is still actively sold. The 4TB version retails around ¥178,000 in Japan. It comes with a 5-year warranty and an industry-leading 2500TBW endurance rating for this capacity. Release: 2019 Warranty: 5 years Endurance: 2500TBW Target: NAS, 24/7 systems In the market, it sits above entry-level SATA SSDs due to its price and endurance. It's a direct competitor to drives like the Samsung 870 EVO and Crucial MX500 in the high-endurance segment.

Best Use Cases

First, NAS builders who need reliable storage for file servers, media libraries, or backup targets. The high TBW ensures the drive won't wear out quickly under constant writes, and the 5-year warranty reduces long-term risk. Second, users building a silent PC. Unlike NVMe drives that often require heatsinks, this SATA SSD runs cool and can be placed in a well-ventilated 2.5-inch bay without active cooling. Ideal for HTPCs or office machines. Third, upgrading older systems that lack M.2 slots but have available SATA ports. The 4TB capacity gives a massive storage boost for a secondary drive or bulk storage.

Things to Consider

The most obvious limitation is speed. SATA caps out at ~550 MB/s sequential, so if you frequently move large files or run applications that benefit from low latency, NVMe is a better choice. This SSD is not for fast game loading or heavy video editing scratch disks. Compared to the Samsung 870 EVO (4TB), the WD Red SA500 offers higher TBW (2500 vs 1200) but may have slightly lower random performance. The Crucial MX500 is cheaper but also has lower endurance. For pure NAS duty, the WD's endurance and NAS-optimized firmware give it an edge. Finally, check your NAS vendor's official compatibility list. While this drive is widely supported, some older NAS models may not fully utilize TRIM or S.M.A.R.T. attributes. ## Alternatives
Samsung 870 EVO 4TB is the main alternative. It has better random read/write speeds for desktop use and is often priced similarly. However, its endurance (1200TBW) is half of the WD's, making it less suitable for write-heavy NAS workloads. Crucial MX500 4TB is another option at a lower price point, but with lower endurance and a 5-year warranty that has a lower TBW ceiling. For a budget NAS build, MX500 suffices, but for long-term 24/7 operation, the WD Red SA500 is the more reliable pick.

Product Disclosure (Amazon)

  • Manufacturer: ウエスタンデジタル(Western Digital)
  • Seller: Non Dual 本店
  • Fulfilled by: Non Dual 本店
  • ASIN: B07YFGTXHT
  • Note: This article covers a manufacturer-made product based on Amazon listing details.