Synology M2D18 Adapter Card Designed to supercharge your NAS I/O performance without sacrificing 2 bays for normal volume. • PCIe Gen2 x8 adapter card for Dual M.2 SSD slot • Support form factor: 2280/2260/2242 • Supports M.2 NVMe or SATA SSD Supported models (M.2 NVMe & M.2 SATA SSD) FS1018, RS820RP+, RS820+, DS2419+, DS1819+, RS2818RP+, RS2418RP+, RS2418+, DS3018xs, DS1618+ Supported models (M.2 SATA SSD ONLY) FS2017, RS1219+, RS3618xs, RS818RP+, RS818+, RS18017xs+, RS4017xs+, RS3617xs+, RS3617RPxs, DS3617xs, DS1817+, DS1517+ Suggested SSD: https://goo.gl/2wFykU [NVMe] Samsung 970 PRO (512GB/1TB) (By Order) [NVMe] Samsung 970 EVO (250GB/500GB/1TB) [SATA] Samsung 860 EVO (250GB/500GB) (By Order)