The Synology DiskStation DS225+ is a compact 2-bay NAS solution designed to centralize data management, offering a comprehensive suite of tools through Synology DiskStation Manager DSM for managing, sharing, and protecting files and photos, backing up devices and data, and serving as the core of a smart surveillance system. 3 Year Warranty extendable to 5 years with EW201 ( additional purchase). COMPATIBLE SYNOLOGY HDDs REQUIRED. View Synology Products Compatibility List online to check all compatible products.