There are Thunderbolt 3 external SSDs that have an M.2 NVME SSD inside. You could probably open them up and swap your own SSD in. Bare enclosures without an inc

There are Thunderbolt 3 external SSDs that have an M.2 NVME SSD inside. You could probably open them up and swap your own SSD in. Bare enclosures without an included SSD appear to be less common. - Netstor enclosure with 2xM.2 NVME slots and Thunderbolt 3 daisy chaining, no SSD included ($360): https://www.tomshardware.com/reviews/netstor-na611tb3-thunderbolt-3-nvme-portable-ssd,5359.html https://www.tomshardware.com/reviews/netstor-na611tb3-thunde... - LaCie Bolt^3, similar features as above but with 2x1TB SSDs ($2000): https://www.anandtech.com/show/10801/lacie-announces-bolt3-2-tb-external-ssd-28-gbps https://www.anandtech.com/show/10801/lacie-announces-bolt3-2... - Plugable 480GB Thunderbolt 3 SSD ($400): https://www.tweaktown.com/reviews/8514/plugable-thunderbolt-3-nvme-ssd-review/index.html https://www.tweaktown.com/reviews/8514/plugable-thunderbolt-... - Patriot EVLVR Thunderbolt 3 SSD, 256GB ($200): https://www.anandtech.com/show/12257/patriot-announces-evlvr-thunderbolt-3-ssds https://www.anandtech.com/show/12257/patriot-announces-evlvr...