Relatively Cheap SSD Thunderbolt 3 External Blade Drives For Mac
These screamingly fast full 40Gbps Thunderbolt3 SSD drives from CableMatters and Plugable use PCIe NVMe SSD blade modules to achieve their impressive Read / Write speeds never before seen in consumer storage with a price tag near or just under $300 USD. For well under $1/Gigabyte they can deliver up to 2400MBps Reads and 1200MBps writes.
These currently shipping drives from Cable Matters both offer 480GB / 512GB solid-state modules tied to a ThunderBolt 3 ONLY interface. Note that a new Mac's ThunderBolt 3 ports transmit BOTH native 40GbpsTBolt3 AND 10Gbps USB 3.1 Gen 2 protocols. However the two drives featured above do not operate on Type-C ports in USB 3.1 mode. So they are ThunderBolt 3 ONLY.
Also note that on some PC and Mac computer models (notably the first 2016 MacBook Pro series), some ThunderBolt 3 ports might operate at a maximum of 20Gbps -- Not the maximum 40Gbps. In these cases, the cheapest ThunderBolt 3 drives shown above will perform at somewhat lower speeds due to the reduced available bandwidth. Confusing, huh?