Synology DiskStation DS1821+ 8-bay NAS(Up to 18Bays), RAM 4GB(up to 32GB)

-CPU Model: AMD Ryzen V1500B

-CPU Frequency: 4-core 2.2 GHz

-System Memory: 4 GB DDR4 ECC SODIMM (Up to 32GB)

-Total Memory Slots: 2

-Drive Bays: 8Bays (Up to 18Bays)

-Built-in M.2 Drive Slots: 2 (NVMe)

-Compatible Drive Type* : 3.5" SATA HDD, 2.5" SATA HDD,2.5" SATA SSD,M.2 2280 NVMe SSD

-RJ-45 1GbE LAN Port: 4 (with Link Aggregation / Failover support)

-USB 3.2 Gen 1 Port*: 4-eSATA Port: 2

-PCIe Expansion: 1 x Gen3 x8 slot (x4 link)

-Warranty: 3Years