New to the mix are an improved version of the Backup & Restore app called Hyper Backup Vault, and Snapshot Replication, which leverages the new Btrfs file system’s snapshot capabilities.You can also sync multiple NAS boxes (even other vendor’s, if they support RSync) anywhere in the world. There are also apps that back up and/or sync to S3, Glacier, DropBox and other online services.
The Synology DS216+ is a great little box, and streams multimedia as well as any NAS box in its class. If you’re looking for a central repository for your songs, photos, and movies that any device in your house can acces, you could do far worse.
But if you’re not dead set on the 2160p transcoding, you can get away far cheaper with other NAS boxes—including Synology’s less-expensive models, of which there are many. When simply opening and playing files from a network drive, I’m able to play 4K/UHD files just fine from a far older Synology DS411 Slim.
DSM 6.0 brings Synology’s boxes up to snuff in terms of backup, replication, snapshots, and spreading storage across multiple devices. Those are features more of interest to business users than multimedia mavens, but they're welcome nonetheless.
One caveat on the whole NAS for multimedia deal: Streaming and accessing files on a NAS box is simple enough for anyone, but setup requires a fair amount of tech savvy.
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