Data Storage NAS DiskStation DS1520+ (Diskless), 5-Bay; 8GB DDR4

Capacity-scalable NAS with SSD Cache Acceleration Capability. Compatible Drive Type-3.5 inch SATA HDD, 2.5 inch SATA HDD, 2.5 inch SATA SSD, M.2 2280 NVMe SSD. "Compatible drive type" indicates drives that have been tested to be compatible with Data Storage products. This term does not indicate the maximum connection speed of each drive bay. Each internal volume (may consist of multiple drives) is expandable up to 108TB
Flexibly scale up to fifteen drives to increase storage capacity as demand grows
Built-in M.2 2280 NVMe SSD slots permit cache acceleration without occupying storage drive bays
Back up critical data and reduce Recovery Time Objective (RTO) with Snapshot Replication
Accelerated Application Performance Average 16% performance boost to photo indexing and other computing-intensive operations, as well as database response time