Synology M2D18 Adapter Card supporting M.2 SATA SSD.Simple installation process for the benefit of an SSD Cache without sacrificing normal volume. PCIeGen2 x8 adapter card for Dual M.2 SSDslot Support form factor: 2280/2260/2242 Support SSD cache without sacrificing bays for normal volume Both SATA nd NVMe - FS1018, DS3018xs, RS2818RP+ , RS2418+ , RS2418RP+ , DS2419+, DS1819+, DS1618+ SATA Only - FS2017 / RS18017xs+ / RS4017xs+ / RS3618xs / RS3617xs+ / RS3617RPxs / RS1219+ / RS818(RP)+ / DS3617xs / DS1817+ / DS1517+