PCIe Gen 4 vs Gen 3: Do you need to spend extra on SSDs?
Amazon.com: MZHOU PCI-E to USB 3.0 PCI Express Card incl.1 USB C and 2 USB A Ports,Adding M.2 SATA III SSD Devices to a PC or Motherboard Using M.2 NVME to PCIe
GLOTRENDS M.2 PCIe X1 Adapter with M.2 Screw for M.2 PCIe 4.0/3.0 SSD (NVMe/AHCI Key M), PCIe X1/X4/X8/X16 Lane Installation, but Only PCIe X1 Bandwidth (PA09-X1) Add-On Cards - Newegg.com
Amazon.com: 5 Slot M.2 B-Key SATA Base SSD PCI-e 3.0 x2 Bandwidth Expansion Card Require x16 Slot SI-PEX40142 : Electronics
1TB M.2 2230 NVMe PCI Express 3.0 x2 SSD (Solid State Drive)-30mm Half Size, Brand : Samsung PM991 MZ-VLQ1T00, KLFGGAR4AA-K0T0 For Microsoft Surface Pro X, Microsoft Surface Pro 7+, Microsoft Surface Laptop