Synology DiskStation 4-bay DS423+ is a capable performer with all the tools you need to secure, share, back up, and sync your data and media. Built-in solutions available in Synology DiskStation Manager (DSM) let users create their own private cloud, organize and stream music, video, and photo collections across all devices, seamlessly collaborate with partners, set up an intuitive surveillance system, and more. Built-in M.2 2280 NVMe SSD slots permit cache acceleration without occupying storage drive bays Back up critical data and reduce your Recovery Time Objective (RTO) with Snapshot Replication Maximum IP camera: 25 (total of 750 FPS at 720p, H.264) (Including two free camera licenses; additional cameras require the purchasing of additional licenses) 2 GB DDR4 onboard (expandable up to 6 GB by adding 1 x D4NESO-2666-4G ) Classification Small to Medium Business Drive Bays 4 Drive Bay Configuration (#) 3.5' (4), 2.5' (4) + 2 x M.2 NVMe SSD (Slots on the base) Storage Capacity (Installed) None Hot Swap Bays Yes Processor Intel Celeron J4125 4-core CPU Clock Speed 2.0 GHz Memory DRAM (Installed / Max) 2GB / 6GB Memory Type DDR4 USB Port Yes eSATA Port No LAN 2 x 1GbE (RJ-45) LCD Display Panel No Cooling Fan 2 (92 x 92 x 25 mm) Software Synology DSM Package Contents Main Unit (1), Accessory Pack (1), AC Power Cord (1), RJ-45 LAN Cable (2) Warranty 3 Years