The DS220j is an entry-level 2-bay NAS that allows home users to conveniently back up and share their photos, videos, and documents. The private cloud solution runs the DiskStation Manager (DSM) operating system with its user-friendly interface and apps to easily back up data from computers and mobile devices at no extra cost.Synology's comprehensive multiple file version backup solutions protect your digital assets on computers (Windows/Mac) and mobile devices (Android/iOS) from attacks including the growing threat of encryption ransomware.Turn your Synology NAS into your private media server and stream digital content to your favorite devices such as computers, mobile devices, Samsung TV, Apple TV, Google Chromecast, and DLNA devices.Storage management made easy with Synology Hybrid RAID (SHR) technology. SHR is an automatic RAID management system that allows you to easily create and expand storage volumes and migrate RAID types without having to go into detail about RAID setup. SHR provides 1-disk redundancy to protect your data in the event of drive failures.WD Red Plus offers concentrated performance for small and medium business NAS environments and increased workloads in home and small offices. It is optimized for archiving, sharing content, and building RAID arrays in systems using ZFS and other file systems. Designed and tested for NAS systems with up to 8 drive bays, the hard drives provide the flexibility, versatility, and security you need when storing and sharing your valuable personal and business files.Synology DiskStation Manager (DSM) is a sleek, browser-based operating system that makes managing your Synology NAS a breeze. With its intuitive user interface, it greatly simplifies accessing and sharing your data. From the Synology Package Center, you can download and install useful add-on packages designed specifically for individual or business needs, for more enjoyment in personal entertainment or higher productivity at work.