Please see Answer ID 8200: Instructions to Format a Drive for Use with Windows or macOS for more information. WD Quick Formatter for Mac is not supported on macOS Yosemite, El Capitan, or Sierra.

Download, unzip, install, and run the WD Quick Formatter for Windows ( if running Windows, or WD Quick Formatter for Mac if running macOS 10.5, 10.6, 10.7, 10.8, or 10.9 (Leopard, Snow Leopard, Lion, Mountain Lion, or Mavericks).

To reformat an external hard drive to the NTFS (Windows) or HFS+ (Mac) file system, please follow the instructions below:

WD Quick Formatter will only format a single partition.

Western Digital recommends that when formatting a drive that it be the only drive present on the system to limit occurences of accidental data loss.

Once the process begins, ALL THE DATA ON THE DRIVE WILL BE LOST! This process is Data Destructive and cannot be undone.

The instructions in the articles below are designed to help users reformat and repartition an external drive.

The WD Quick Formatter is the recommended way to format WD external drives that use Advanced Format Drives (AFDs).This is necessary in order to optimize the performance of the drive. Once the WD Quick Formatter is finished reformatting the drive, the drive will only have one partition. The WD Quick Formatter is ONLY for external drives.

This answer explains how to use the WD Quick Formatter to format a WD external drive in Windows (8, 7, Vista, or XP) and Mac OSX (Leopard, Snow Leopard, Lion, Mt.

Reformat mac hard drive