Synology DS220j 4TB 2 Bay Desktop NAS Solution | Installed with 2 x 2TB Western Digital Red Drives 24/7 file server for your household to store, share, and backup personal data Award-winning Disk Station Manager (DSM) brings intuitive operation flow and reduces learning curve Access and share data with any Windows, mac OS, and Linux computers or mobile devices Integrated media server to support multimedia content streaming Freely access private cloud files on-the-go and back up mobile photos with iOS and Android apps Safeguard digital assets with cross-platform computer backup applications Synology Disk Station DS220j is an entry-level network-attached storage for your household to store and share photos, videos, documents, and all types of personal data. The 2-bay private cloud solution provides complete and intuitive data protection approaches for you to easily back up computer data and mobile photos, with just a few clicks.