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The DS220j is Synology's entry-level two-bay NAS, sold diskless so you add your own drives. It runs DiskStation Manager, a mature operating system for file sharing, scheduled backups, photo and media streaming, and remote access through Synology's apps. Its hardware is modest: a Realtek quad-core CPU and 512MB of non-upgradeable RAM, so it handles file serving and backup well but struggles with heavy multitasking, virtual machines and lots of Docker containers. Compared with Synology's Plus-series two-bay units, it gives up expandable memory, faster networking and CPU headroom in exchange for simplicity and low power draw, which suits households and light office users rather than power users.
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Owners treat the DS220j as a dependable, quiet entry NAS for backups and file sharing. Most praise DSM and the simple setup, while criticising the fixed 512MB of RAM and slow performance once several services run at once.
The Synology DS220j is a 2-bay NAS (network attached storage) that is sold diskless, so you add your own drives. It works as an always-on file server for a household, used to store, share and back up personal data.
It runs DiskStation Manager (DSM), Synology's operating system, which is designed to be intuitive and easy to learn. You can access and share data from Windows, macOS and Linux computers and from mobile devices.
An integrated media server streams multimedia content. The iOS and Android apps give access to private cloud files on the go and can back up photos from a mobile device.
