Ultimate reliability from the trusted name in storage - Built from the ground up with the quality and reliability you've come to expect from WD and backed by a two-year warranty, My Cloud EX4 is a high-performance, four-bay NAS for your home or small office. It offers a robust all-metal enclosure, multiple RAID volumes, easy drive installation and a full suite of apps for the power and flexibility to expand your NAS features.
Your options are endless - Choose the diskless enclosure with easy drive install and hot swap to effortlessly add up to four drives and grow as your needs expand. Or, choose a populated system that works right out of the box, featuring WD Red hard drives for ultimate compatibility in the unique 24x7 NAS operating environment.
Drive management and data protection at its best - You're armed with multiple options to secure your data from loss. Choose RAID 0, 1, 5, 10 or select from spanning and JBOD modes for even more options to manage your data.
Speed (RAID 0)
RAID 0 mode provides disk striping across all drives in the RAID drive group. RAID 0 does not provide data redundancy but does provide the best performance of any RAID levels. RAID 0 breaks up data into smaller segments and stripes the data segments across each drive in the drive group.
Data protection (RAID 1)
Set the system to data protection mode (also known as mirrored mode or RAID 1) and the capacity is divided in half. Half of the capacity is used to store your data and half is used for a duplicate copy. If one drive goes down your data is protected because it's duplicated.
Data protection and speed (RAID 5)
In systems with three or more drives we recommend that you set the system to RAID 5.
This gives you the best of both worlds: fast performance by striping data across all drives; data protection by dedicating a quarter of each drive to fault tolerance leaving three quarters of the system capacity available for data storage.
Very high reliability with high performance
(RAID 10 or RAID 1+0)
RAID 10 delivers very high I/O rates by striping RAID 1 (mirrored) segments. This RAID mode is good for business critical database management solutions that require maximum performance and high fault tolerance. A system set to RAID 10 yields half the total capacity of all the drives in the array.
JBOD & spanning
JBOD is the use of one or more drives not in a RAID configuration but managed as separate logical volumes. Spanning is the combination of drives in a linear fashion to create one large logical volume. The advantage of using this mode is that you can add more drive without having to reformat the system.
Easy to manage - A powerful dashboard and LCD display means your system is always under your control. Monitor your drives, manage users and utilize energy-saving features. Email and mobile alerts keep you informed on My Cloud EX4 status.
Award-winning desktop and mobile apps - With WD's My Cloud mobile and desktop apps, you can upload, access and share your documents from anywhere. Conveniently transfer files from your public cloud service to the EX4 directly from the mobile app.
Powerful apps to customize your NAS - Featuring industry-leading apps, including aMule, Icecast, Joomla!, phpBB, phpMyAdmin and SqueezeCenter.
Advanced Serving Options - Integrated file server, FTP server, backup server and P2P download server.
Stream media to your connected devices - Stream videos and photos to connected TVs, media players, gaming consoles and other DLNA/UPnP devices. Features a Twonky 7.2 and a DLNA-certified 1.5 media server. And with My Cloud EX4's iTunes server, you can easily stream your music collection.
Back up, your way - Protect your data with remote backup to another EX4, integrated cloud backup or local LAN/WAN backup. PC users, WD SmartWare Pro offers options for how, when and where you back up your files for up to ten computers. Mac users, utilize all the features of Apple Time Machine backup software to protect your data.
Increase your personal cloud capacity - Simply attach a compatible USB 3.0 hard drive directly to one of the two USB expansion ports on My Cloud EX4 and instantly expand your storage capacity.
Integrated energy-saving features - Save money on your energy bill with disk spin-down and scheduled power on/off.
Your own personal cloud - Unlike public clouds, My Cloud EX4 allows you to keep all your content in one safe place on your home or office network instead of a remote server. No mysterious location of your data. No monthly fees. No limits. Just blazing-fast performance for your high-speed digital life.
Advanced features - iSCSI target, full-featured FTP services, link aggregation and failover support, jumbo frame support, iPv6 ready, UPS support (USB and network), real time resource monitor, volume encryption with boot-up password, SNMP and virtual volumes.
Windows 8, Windows 7, Windows Vista or Windows XP (SP 3) operating systems
Mac OS X Mountain Lion, Lion or Snow Leopard operating systems
DLNA /UPnP devices for streaming
Internet Explorer 8 or higher
Safari 6 or higher
Firefox 21 or higher
Google Chrome 27 and later on supported Windows and Mac OS platforms
Compatibility may vary depending on user's hardware configuration and operating system.