WD Sentinel DS6100 12 TB Ultra-Compact Storage Plus Server (WDBWVL0120KBK-NESN) Ideal desktop NAS solution for small businesses and offices with up to 25 users, with multiple interface options, high endurance drives, high performance processing, and running Microsoft Windows Server 2012 R2 Essentials operating system. Ultra compact desktop design, the Sentinel DS6100 is plug and play, ready to go right out of the box for quick setup and use. Microsoft Windows Server 2012 R2 Essentials provides fast access for up to 25 users and 50 devices with secure backup, remote access and sharing of documents and folders. Enterprise grade hard drives, backup and restore software, redundant network connections and power supplies to ensure the highest possible reliability and uptime. Built with an Intel Xeon quad core processor, WD Sentinel DS6100 keeps your business running smoothly with server-class features that help protect critical business data and allows quick recovery in the event of a failure. The iSCSI interface allows for increased flexibility in configurations, allowing IT professionals to create multiple targets to meet the needs of their organizations. WD Sentinel DS6100 includes the hardware and software needed to centralize your business files. Once it's set up, administration is easy because it intelligently manages drive and network status, reducing maintenance time so you can focus on your business.