The DS216+II is powered by a dual-core Intel Celeron N3060 CPU which runs at 1.6GHz and 1GB of DDR3 memory. It supports up to 20TB of storage (two 10TB drives) and a variety of RAID configurations including Basic, JBOD, RAID 0, RAID 1, and Synology's SHR Hybrid RAID with one-disk fault tolerance. Supported file types for internal drives include Btrfs and EXT4.
The DS216+II's matte black housing measures 6.4 by 4.2 by 9.1 inches (HWD) and its two front-loading drive bays are hidden behind a removable black plastic panel. To the right of the panel are a status indicator, a LAN indicator, drive activity indicators, a USB 3.0 port, a Copy button that offers one-touch file transfers between a connected USB drive and the NAS device, and a power switch. Around back are a gigabit LAN port, two USB 2.0 ports, a reset button, and a power jack.