Add a PCIe M.2 SSD to your TB3 computer via the TB3 chassis Swap the PCIe card Assemble with a screwdriver Thunderbolt 3 to PCIe / Thunderbolt 3 to PCIe x16 adapter / Thunderbolt 3 to ssd / Thunderbolt 3 to m.2 adapter / External PCI express enclosure / External PCI express slot / External PCI slot / External PCIe enclosure / PCIe expansion slot / PCIe slot / Thunderbolt 3 expansion chassis / Thunderbolt 3 PCIe card / Thunderbolt 3 PCIe expansion chassis / Thunderbolt 3 PCIe SSD