It’s hard to beat synology: small form factor, low power, quiet, excellent DSM software, web interface for file browsing, expandable array, a lot of apps including mobile apps for photo backup and backup apps, etc.

But Synology doesn’t use ZFS, which is a better filesystem than btrfs. In particular ZFS offers native encryption (instead of the clunky ecryptfs in synology), and allows ZFS send from Linux servers.