WD 4TB My Book for Mac Desktop External Hard Drive - USB 3.0 - WDBYCC0040HBK-NESN

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Compatibility: Formatted HFS + Journaled for Mac OS X, Snow Leopard, Lion or Mountain Lion
Requires reformatting for Windows operating systems

Note: Compatibility may vary depending on user's hardware configuration and operating system

Features: My Book for Mac desktop storage features ultra-fast USB 3.0 connectivity, is formatted for Mac, compatible with Apple Time Machine, and offers password protection with hardware encryption.

Ultra-fast transfer rates - My Book for Mac desktop storage features SuperSpeed USB 3.0 for ultra-fast data transfer rates. Connect this drive to a SuperSpeed USB 3.0 port to access and save files in record time.

Universal connectivity - With this drive you get connectivity with the latest USB 3.0 devices as well as backward compatibility with USB 2.0 devices.

High capacity in a sleek design- With up to 4 TB capacity, there's plenty of room to store and protect your creative endeavors and your photos, videos and music.

Fast, seamless Time Machine backup - Back up your files quickly and easily with Apple Time Machine.

HFS+ Journaled - Works right out of the box with Max OS X 10.5 or later operating systems. Can be reformatted for Windows operating systems.

WD Security - WD Security software allows you to set password protection and hardware encryption for your drive to protect your files from unauthorized use or access.

WD Drive Utilities - Register your drive, set drive timer, run diagnostics and more using WD Drive Utilities.