Internal PCIe SSD vs External thunderbolt speeds - FCP.co Forum
Quick Look: Using WD's Black SN750 SSD as a Thunderbolt 3 External Drive
Amazon.com: Plugable USB C to M.2 NVMe Tool-free Enclosure USB C and Thunderbolt 3 Compatible up to USB 3.1 Gen 2 Speeds (10Gbps). Adapter Includes USB-C and USB 3.0 Cables (Supports M.2
Plugable's Thunderbolt 3 SSD is astoundingly fast portable storage