Western Digital WD Blue
WD Blue 3TB (WD30EZAZ) budget 3.5-inch SATA HDD, 5400 RPM class, 256 MB cache, SMR—best for inexpensive bulk storage.
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Product overview
WD Blue 3TB (WD30EZAZ) is a 3.5-inch SATA desktop HDD in Western Digital’s WD Blue 3.5-inch PC HDD family; it first appeared at retail in February 2021. ([newegg.com](https://www.newegg.com/Blue-WD30EZAZ-3TB/p/N82E16822234468?utm_source=openai)) WD’s own documentation lists this SKU as 5400‑RPM class with a 256 MB cache, and the WD portfolio materials identify WD30EZAZ as an SMR (shingled) model. ([westerndigital.com](https://www.westerndigital.com/content/dam/doc-library/en_us/assets/public/western-digital/product/internal-drives/wd-blue-hdd/product-brief-western-digital-wd-blue-pc-hdd.pdf?utm_source=openai))
Positioned as a budget HDD, it exists to deliver inexpensive bulk capacity for everyday PCs. With SATA 6 Gb/s and 3 TB in a 3.5-inch form factor, it’s a good fit for mass storage and a cold game library or budget upgrade; prefer SSDs for boot/apps and avoid heavy parity‑array writes due to SMR behavior. Not marked discontinued—WD still lists the SKU on its product page as of July 2026. ([westerndigital.com](https://www.westerndigital.com/products/internal-drives/wd-blue-desktop-sata-hdd?sku=WD30EZAZ&utm_source=openai))
- mass storage
- game library
- budget upgrade
Product highlights
- Reliable everyday computing
- Western Digital quality and reliability
- Free Acronis True Image WD Edition cloning software
- Massive capacity up to 6TB*
Specifications
- Capacity
- 3 TB
- Type
- HDD
- Form factor
- 3.5
- Hardware Interface
- SATA
- Data Transfer Rate
- 600 MB
- Read speed
- 147 MB/s
- Tdp
- 4 W
