Western Digital 4TB WD Black
WD Black 4TB (WD4005FZBX) 3.5-inch 7200RPM SATA HDD with 256MB cache, launched Feb 23, 2018; ideal for desktop game libraries and bulk storage.
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Product overview
Released on February 23, 2018, the WD Black 4TB (WD4005FZBX) is a 3.5-inch, 7200‑RPM SATA 6 Gb/s member of Western Digital’s WD_BLACK desktop HDD line, the FZBX refresh that doubled cache to 256 MB; WD’s spec sheet rates the 4TB model around 202 MB/s sustained transfers.
In today’s storage landscape it’s a budget-tier option aimed at affordable bulk capacity—why it exists is to hold large game libraries and files cheaper than SSDs, backed by a 5‑year warranty. It’s best used as a secondary “game library” or general mass‑storage drive in a desktop with 3.5-inch bays; use an SSD for your OS and heavy scratch work. As of 2026 it remains listed by WD (not discontinued). Unique note: 256 MB DRAM cache with StableTrac/Dynamic Cache tech.
- game library
- mass storage
- budget upgrade
Product highlights
- Desktop performance gaming hard drive
- Performance storage available in up to 10TB* capacities | * As used for storage capacity, 1TB = one trillion bytes. Actual user capacity may be less depending on operating environment.
- Designed for gamers, system builders, and creative professionals.
- Western Digital’s StableTrac and Dynamic Cache Technology increase reliability and optimize performance
- An industry-leading 5-year limited warranty** | ** See official Western Digital website for warranty details.
Specifications
- Capacity
- 4 TB
- Type
- HDD
- Form factor
- 3.5
- Hardware Interface
- SATA
- Data Transfer Rate
- 600 MB
- Read speed
- 256 MB/s
- Tdp
- 9 W
