Description Ports Category Connection Bus Onboard M.2 ports Onboard M.2 form factor Onboard M.2 interface
Synology dual M.2 SSD adapter cards M2D18         2 x M.2 2242, 2260, 2280 PCIe 3.0 x4, SATA
Synology dual M.2 SSD adapter card M2D20         2 x M.2 2280, 22110 PCIe 3.0 x4
Synology 10 Gigabit RJ45 dual port / M.2 NVMe combo adapter card 1 10 Gbit RJ45 (10 Gbit/s) PCIe 3.0 x8   22110 PCIe 3.0 x8