Multiple NVMe SSDs on single motherboard

Multiple NVMe SSDs on single motherboard m 2 ssd slot nvme pcie gen3 ; 2 USB Gen2 (Rear Ready for higher capacity and even faster Type 2280 NVMe SSD to fulfill the need of performance m2 expansion slot Please help me regarding this Does my laptop support both SATA and PCIe NVMe ? Please clarify Which one should i buy Crucial P1 3D NAND

m2 expansion slot Dual For SSD Two of the world's fastest slots One delivers up to PCIe Gen3 x4 32Gbs transfer speed, the other one supports SATA3

m24 slot 1 x 67 pin key M slot 1 x 67 pin key B slot 2 SSD PCIe NVMe Key M 2280 Synology SNV3400 series NVMe SSD drives can be installed through the built-in slots to enable SSD caching or create SSD storage pools Drives are sold