• Up to 4 TB capacity.
• Dual USB 3.0 and USB 2.0 compatibility.
• Automatic, continuous backup or file backup option.
• Pas protection and hardware encryption.
• 2-year limited warranty.

Product Description ------------------- Put your digital life on the sleek, high capacity My Book® Essential™ external hard drive. With WD quality and USB 3.0 and USB 2.0 connectivity, this drive is designed for today with tomorrow in mind. 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. From the Manufacturer --------------------- My Book External Hard Drive –Ultra-fast backup and storage. ----------------------------------------------------------- Put your digital life on the high capacity My Book desktop hard drive with ultra-fast USB 3.0 connectivity. WD SmartWare automatic backup software and pas protection with hardware encryption ensure your data is protected. Massive capacity. Sleek design. My Book features ultra-fast USB 3.0 connectivity and up to 4 TB capacity to store and protect all the chapters of your digital life. Automatic backup. WD SmartWare automatic backup software works quietly in the background to help protect your data using minimal PC resources. Whenever you add or change a file, it’s instantly backed up. Pas protection secures your drive. Use WD Security to set pas protection and hardware encryption and protect your files from unauthorized use or access. Dual USB 3.0 and USB 2.0 interface- 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. 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. Massive capacity - With up to 4 TB capacity, there is plenty of room to store and protect your precious memories and important files. 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. 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. Pas protection for privacy - Gain peace of mind knowing that your data is protected from unauthorized access with pas protection and encryption. 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. Ideal for * Transferring files up to three times faster when connected to a USB 3.0 port * Connecting with your USB 2.0 port today and using with USB 3.0 when you're ready * Protecting your data with automatic, continuous backup * Adding extra storage space for photos, videos and music * Securing private or sensitive data with pas protection and hardware encryption What's in the box External hard drive, USB cable, WD SmartWare software, AC adapter, Quick Install Guide. Compatibility Formatted NTFS Windows XP, Windows Vista, Windows 7 or Windows 8 Mac OS X (requires reformatting) Note: Compatibility may vary depending on user's hardware configuration and operating system. Features at a glance * Dual USB 3.0 and USB 2.0 compatibility * WD SmartWare software * Automatic, continuous backup * Pas protection and hardware encryption For more great WD products, visit the Western Digital Store at .com ( http://www..com/b/?&node=2637571011 ) External Storage Comparison Chart Storage with backup ------------------- Storage with backup and anywhere access ------------------- My Passport Edge ( http://www..com/dp/B008PQJWBE ) My Passport ( http://www..com/dp/B0041OSAZS ) My Book ( http://www..com/dp/B008S94HXG ) My Book Live ( http://www..com/dp/B0047FL85U ) My Book Live Duo ( http://www..com/dp/B0064XAIZY ) Ultra-compact, high-capacity storage to go. Ultra-fast backup and storage to go. Ultra-fast storage and backup. Shared storage for computers, s and s. Double-safe storage for all your screens. Interface USB 3.0, USB 2.0 USB 3.0, USB 2.0 USB 3.0, USB 2.0 Gigabit Ethernet Gigabit Ethernet Capacity range 500 GB 500 GB - 2 TB 1 TB - 4 TB 1 TB - 3 TB 4 TB - 6 TB Mobile apps ( http://www..com/gp/feature.html?docId=1000717721 ) WD SmartWare backup software Pas protection and hardware encryption Network connection Remote access Portable form factor RAID RAID 0/1 Mac ready PC ready