This article covers WD Red 4TB SATA3.0 NAS 5400rpm.

Overview

The Western Digital WD Red series is designed specifically for NAS (Network Attached Storage) environments. The WD40EFRX model offers 4TB of storage capacity, a 5400rpm spindle speed, and 64MB of cache. It uses a SATA 3.0 (6Gb/s) interface and comes in a 3.5-inch form factor. Built for 24/7 operation, this drive is optimized for RAID arrays and continuous data access. It is an excellent choice for home and small office NAS systems that require reliable, cost-effective storage.

Compatibility Guide

This drive is a 3.5-inch internal HDD with a standard SATA interface. It can be connected to any NAS or PC that has an available SATA port and a SATA power connector. Many NAS manufacturers officially recommend WD Red drives for their systems. Note that it will not fit in 2.5-inch drive bays, so ensure your enclosure or case has a 3.5-inch slot. It is compatible with most RAID configurations and supports hot-swapping in compatible NAS units.

Product Info

The WD Red 4TB (WD40EFRX) is part of Western Digital's NAS-optimized hard drive lineup. Originally released around 2014, it remains a popular choice due to its proven reliability. The typical retail price is around ¥19,800, and it comes with a 3-year manufacturer warranty. In the market, it sits at the entry-to-mid tier for NAS HDDs, balancing cost and dependability. The 5400rpm speed keeps noise and power consumption low, making it suitable for always-on environments.

Best Use Cases

This drive is ideal for several scenarios. First, home users building a NAS for media storage, photo backups, or personal cloud services. The WD Red's 24/7 rating ensures long-term reliability. Second, small businesses needing a file server or backup target. Its compatibility with RAID 1, 5, or 10 provides data redundancy without breaking the budget. Third, anyone expanding an existing NAS with additional capacity. 4TB is a sweet spot for most home setups, offering ample space for documents, music, and videos.

Things to Consider

Because this drive spins at 5400rpm, its sequential read/write speeds are lower than 7200rpm models. It is not ideal for frequent large file transfers or as a primary OS drive. Compared to SSDs, access times are significantly slower, so avoid using it for applications that require fast random I/O. For desktop use, consider the WD Blue series instead. Also, while 4TB is sufficient for many users, those with large media libraries may want to look at 8TB or higher capacity drives. Always check your NAS compatibility list before purchasing.

Product Disclosure (Amazon)

  • Manufacturer: ウエスタンデジタル(Western Digital)
  • ASIN: B00EHBERSE
  • Note: This article covers a manufacturer-made product based on Amazon listing details.