Synology DiskStation DS1520+ is an ideal network-attached storage solution, suitable for small office and IT enthusiasts. Two built-in M.2 SSD slots and Synology SSD Cache technology allow you to boost system I/O and application performance. With scalable storage design, DS1520+ lets you start small and expand storage capacity with the Synology DX517 as your data grows. Extended Warranty - Extend warranty from 3 years to 5 Years with the additional purchase of EW201 ( Extended Warranty license must be registered at the same time as the NAS), Fixed RAM - 8 GB DDR4 non-ECC (4 GB onboard & 4 GB SO-DIMM)

• Average 16% performance boost to photo indexing and other computing-intensive operations, as well as database response time
• Built-in M.2 2280 NVMe SSD slots permit cache acceleration without occupying storage drive bays (Use SNV3400-400G)
• Flexibly scale up to fifteen drives to increase storage capacity as demand grows
• Back up critical data and reduce Recovery Time Objective (RTO) with Snapshot Replication
• Feature-rich Surveillance Station with user-friendly management tools
• Scale up to 15 drives with two DX517 expansion units
• Maximum IP camera: 40 (total of 1,200 FPS at 720p, H.264) (Includes two free camera licenses; additional cameras require the purchasing of additional licenses)
• This NAS model supports Synology High Availability (SHA)
• Model Supports Active Backup for Office365 - Free Software. No Additional licensing required!