New WD 4TB My Book USB 3.0 External Hard Drive. Boxed.

Store, carry, and protect your important data with the 4TB My Book USB 3.0 External Hard Drive from WD. With a capacity of 4TB, use it for extra storage or for backing up your videos, photos, music, documents, and more. The My Book connects to your computer using a USB 3.0 port at speeds up to 5 Gb/s; is backwards compatible with USB 2.0 at speeds up to 480 Mb/s; and is formatted as NTFS for use with Windows 10, 8, and 7. The My Book is also compatible with Mac OS X via a drive reformat.

The WD 4TB My Book USB 3.0 External Hard Drive operates using an included AC adapter that runs using 100-240 VAC at 47-63 Hz. Also included is a USB cable and WD backup software.
Fast Transfer Rates
My Book premium storage is optimized for the fast data transfer rates. Connect this drive to a USB 3.0 port to access and save files at up to 5 Gb/s
Capacity
With up to 4TB capacity, there's plenty of room to store and protect your precious memories and important files
Automatic Backup Software
WD backup software works in the background to help protect your data using minimal PC resources. Select automatic, continuous backup to instantly back up your files, or select the scheduled backup option to back up your files on your schedule and take control of your backup
Local and Cloud Backup
WD backup software lets you choose when and where you back up your files:

Choose scheduled backup to back up your files on a schedule that fits your needs
Choose automatic, continuous backup to make a second copy of your files as they are added or changed and saved
Use your Dropbox account to back up your files to the cloud

System-Level Backup
Acronis True Image WD Edition is an integrated software suite that helps secure all the information on your PC. With it, you can back up your files on a system level, including your operating system, securely delete confidential data, restore backed up data quickly, and restore your system should your computer crash
Universal Connectivity
With this drive, you get connectivity with the USB 3.0 devices at speeds up to 5 Gb/s, as well as backward compatibility with USB 2.0 devices at speeds up to 480 Mb/s
Password Protection
Gain peace of mind knowing that your data is protected from unauthorized access with password protection and encryption