WD My Cloud Expert Series EX4100 4 Bay Diskless NAS 

• WD my cloud Expert EX4100 features a Powerful Marvell ARMADA 388 1.6GHz dual-core processor and 2GB DDR3 memory for ultra-fast transfer speeds of 114MB/s upload and 108MB/s download for brilliant media streaming.
• Simply ave, access, and stream your content anywhere you have an internet connection with Western Digital’s My Cloud mobile app or MyCloud.com web access.
• EX4100 boasts Multiple RAID and backup options to help protect all your valuable media, photos and important files.
• WD's My Cloud OS 5 comes with a variety of tools and apps to give you complete control of your media.  Create a custom folder to share your favorite content. Automatically sync your data between all your computers, so you know your content is always up-to-date. And easily transfer content between your NAS and a supported cloud service like Dropbox, or Google Drive.
• The Plex Media Server in EX4100 NAS keeps all your photos, videos and music beautifully organized and prepared for streaming to your PC, mobile device, game console, or other certified media player. Enrich your media with plot summaries, posters, album covers and enjoy it from home or on the go.
• Easily customize how you share by using public or private links. With a public link, you can share your content so anyone can see it. Using a private link, you can grant a user limited or full-access and securely collaborate with anyone. 
• My Cloud EX4100 comes preconfigured to get you set up and on your way without any hassle. The intuitive dashboard guides you through the process of setting up users and shares, customizing system features and monitoring your storage. And with a toolless and trayless drive bay design, drive installation and hot swap is effortless.
• With WD SmartWare Pro backup software, you can customize when and where the content on all the PCs on your network is saved, while Mac users have full access to Apple Time Machine for personalized backup. You can even automatically back up your data to a separate My Cloud NAS device, or any supported cloud service.
• My Cloud EX4100 supports a full suite of popular applications for a personalized experience. Using apps like Plex, Dropbox, WordPress and more, you can customize your NAS for your own specific needs.
• Equipped with 256 AES volume encryption, it helps to secure your stored files across your entire network. Whether you’re using a PC or a Mac, your content is protected.
• With the RAID settings of the My Cloud EX4100, you can customize your system with the configuration that’s best for you. Use RAID 0 for enhanced performance, RAID 1 for mirrored data protection, or a JBOD / spanning structure for non-RAID configurations.