WD My Book® 4TB

WD quality inside and out.
My Book External drives are the world's best selling drives. There's a reason. We've been making hard drives for 20 years and we know how to protect your data.
USB 3.0 plus USB 2.0.
A single drive with universal compatibility today and next-generation speed for tomorrow. Use it with USB 2.0 now and step up to USB 3.0 speed when you're ready.
See your life safe in one place.
WD SmartWare visual backup software provides a visual display of your backup as it happens so you know your data is safe.
Did you know...
With WD SmartWare, your data is automatically backed up every time you hit save?
Learn how
 
Dual USB 3.0 and USB 2.0 compatibility.
A single drive with universal compatibility today and next-generation speed for tomorrow. Use it with USB 2.0 now and step up to USB 3.0 speed when you're ready.
WD quality inside and out.
For over 20 years, millions of people worldwide have trusted their data to WD hard drives. We are successful because we understand the importance of your data and our first concern is keeping that data safe.
 
Up to 3x faster transfer rates.
When connected to a SuperSpeed USB 3.0 port this drive lets you access and save files up to 3 times faster than USB 2.0. Transfer a 2-hour HD movie in just 3 minutes instead of 13 minutes.* *Performance may vary based on user's hardware and system configuration.
 
Automatic, continuous backup.
Works quietly in the background to protect your data using minimal PC resources. Whenever you add or change a file it's instantly backed up.
 
Planet friendly.
We designed a small box to minimize waste and used recycled material. We encourage you to recycle it.
WD SmartWare software.
You're in control of your backup. Install all the features, select just the components you need, or if you prefer, choose not to use the software at all.
Password protection for privacy.
Gain peace of mind knowing that your data is protected from unauthorized access with password protection and encryption.