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My Cloud Expert Series EX42 (Recertified)
from WD

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High-performance NAS. Ultimate reliability.

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 an ultra-reliable, 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.

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. 

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 accounts to the My Cloud EX4 directly from anywhere with the help of 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 the My Cloud EX4 iTunes® server, you can easily stream your music collection.

Back up, your way
Protect your data with remote backup to another My Cloud 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 Private cloud capacity
Simply attach a compatible USB hard drive directly to one of the two USB 3.0 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 private 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.