Orders placed after 4PM on weekdays will not ship until the next business day. Orders placed after 11AM Fridays will not ship until the following Monday.
Faster shipping methods may be available; just upgrade during checkout.
*Some exclusions apply.
Enjoy Extended Returns thru Feb 1, 2017!
You have until Feb 1, 2017 to return or exchange items purchased between Nov 1, 2016 and Jan 1, 2017. All other standard return policy conditions apply.
Enter new zip code to refresh estimated delivery time.
The 4TB My Book External Hard Drive for Mac from WD is designed for the storage and protection of data, including music, movies, photos, documents, and more. Up to 4TB of storage is combined with USB 3.0 connectivity at speeds of up to 5 Gb/s, giving users the required speed and capacity for their endeavors. This hard drive is backwards compatible with USB 2.0 at speeds up to 480 Mb/s and comes pre-formatted as HFS+ Journaled for Mac OS X El Capitan and Yosemite. It is also compatible with Apple Time Machine to enable quick and easy backups, while password protection and hardware encryption help protect stored files from unauthorized access.
While this My Book does come pre-formatted for Mac OS, it can be used with Windows via a simple drive reformat. It operates using an included 100-240 VAC power adapter at 47-63 Hz and also includes a USB cable. It is protected by a limited 3-year warranty.
Fast Transfer Rates & Universal Connectivity
My Book for Mac desktop storage features USB 3.0 connectivity for fast data transfer rates. Connect this drive to a USB 3.0 port to access and save files at up to 5 Gb/s, as well as USB 2.0 connectivity for data transfer speeds up to 480 Mb/s
With up to 4TB of storage, there's plenty of room to store and protect your creative endeavors, photos, videos, and music
Time Machine Backup
Back up your files quickly and easily with Apple Time Machine
Works right out of the box with Mac OS X El Capitan or Yosemite. Windows compatibility is possible via a reformat
WD Security software allows you to set password protection and hardware encryption for your drive to help protect your files from unauthorized use or access
WD Drive Utilities
Register your drive, set the drive timer, run diagnostics, and more using WD Drive Utilities
In the Box
WD 4TB My Book USB 3.0 External Hard Drive for Mac
Limited 3-Year Warranty
Table of Contents
USB 3.0 and USB 2.0
Data Transfer Rate
USB 3.0 - 5 Gb/s max USB 2.0 - 480 Mb/s max
Operating: 41 to 95°F (5 to 35°C) Non-Operating: -4 to 149°F (-20 to 65°C)
AC Input Voltage
AC Input Frequency
NRCAN Compliant: Yes RoHS Compliant:Yes
Formatted HFS+ Journaled for Mac OS X El Capitan and Yosemite