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) Powerful 2-bay all-round storage solution for small businesses 2GB DDR4 onboard memory expandable up to 6GB with DDR4 non-ECC SO-DIMM 4 GB (D4NS014G) Organize and stream your music, video, and photo collections across all your devices Maximum IP camera: 25 (total of 750 FPS at 720p, H.264) (includes two free camera licenses; additional cameras require the purchasing of additional licenses) Back up critical data and reduce your Recovery Time Objective (RTO) with Snapshot Replication Model supports Active Backup-Office 365