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Around back are a gigabit LAN port, two USB 2.0 ports, a reset button, and a power jack.
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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.
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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. Supported file types for internal drives include Btrfs and EXT4. 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. The DS216+II ( at Amazon) is powered by a dual-core Intel Celeron N3060 CPU which runs at 1.6GHz and 1GB of DDR3 memory. You'll have to supply your own drives, but at just less than $300, it's still a very good deal and is our top pick for two-drive NAS devices. Its intuitive DSM (DiskStation Manager) operating system has a familiar Windows-like look and feel that makes it easy to configure the device whether you're using it as a primary backup solution, a home media server with 4K video transcoding capabilites, a mail server, or a security camera control center. Equipped with a dual-core processor, numerous connectivity ports, and a generous selection of apps, this two-drive storage device delivered solid file transfer performance in our tests and was a snap to set up. The Synology DiskStation DS216+II ($299.99) is a full-featured NAS device designed for home and small business users.
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