WD Blue 2TB (WD20EARZ) PC Desktop Hard Drive – CMR, 5400 RPM Class, 64MB Cache (New)

Reliable everyday storage that expands your desktop PC without overspending.

The WD Blue 2TB (WD20EARZ) is a 3.5-inch SATA 6Gb/s internal hard drive built for desktop PCs, home office machines, and all-in-one systems. It combines 5400 RPM class performance, a 64MB cache, and CMR recording to give home users, students, and small offices dependable capacity for OS backups, documents, and a starter game or media library.

Why the WD Blue 2TB Is the Practical Choice for Desktop Storage

Most storage problems in a home or office PC are not about speed. They are about running out of space: a boot SSD fills up with photos, downloads, and game installs, and the system slows down as free space disappears. The WD Blue 2TB solves that by adding 2TB of low-cost-per-terabyte capacity, so you can keep your SSD for the operating system and move bulk data to a drive designed for it.

WD Blue drives are built and validated for desktop PCs, industrial PCs, and external enclosures. Western Digital tests them in its Functional Integrity Testing (F.I.T.) Lab for compatibility, and uses NoTouch ramp load technology so the recording head never rests on the disk surface. That reduces wear during the start-stop cycles typical of a computer that is switched on and off every day.

The WD20EARZ uses CMR (conventional magnetic recording), which writes each data track independently. Write performance stays predictable during long copies, large game installs, and backup jobs, without the slowdowns associated with shingled recording.

5400 RPM Class Performance With 64MB Cache

The 5400 RPM class spindle runs cooler, quieter, and with lower power draw than 7200 RPM drives. Paired with a 64MB cache, it handles document storage, media playback, and backups smoothly, which is exactly the workload secondary storage sees.

Easy Upgrade and Data Migration

Western Digital provides Acronis True Image WD Edition as a free download, so you can clone an existing drive to the new WD Blue without reinstalling your operating system. Advanced power management features also help keep energy use and heat low in everyday operation.

How It Works / Setup Instructions

How to Install the WD Blue 2TB WD20EARZ

1. Shut down the PC, unplug the power cable, and ground yourself before opening the case.
2. Mount the WD Blue in a free 3.5-inch bay or drive cage using screws or your case’s tool-less tray.
3. Connect a SATA data cable to the motherboard and a SATA power connector from the power supply, then close the case.
4. Power on, open Disk Management (Windows) or Disk Utility (macOS), initialize the drive, and create a partition to start using it.