This blazingly fast external Thunderbolt 3 drive earns four stars despite its whopping $1,300 price tag. If the cost doesn’t faze you, the 2GBps transfer rates will amaze, not to mention save you scads of time.

If you’d walked by our test bed while we were testing Akitio’s Thunder3 PCIe SSD, external drive, you’d probably have stopped and done a double-take. 2GBps transfers from an external drive? No way.

How could this possibly be, you ask? The Thunderbolt 3 interface is basically PCIe over a wire, and features a massive 5GBps transfer rate. The Thunder3 PCIe SSD is a classy-looking, Thunderbolt 3 enclosure that contains a single PCIe slot. Put a 1.2GB Intel 750 NVMe SSD in said slot, and for all intents and purposes, it’s the same as putting it in an internal PCIe slot. 2GBps? Thunderbolt 3 isn’t even breaking a sweat.
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https://www.pcworld.com/article/3111988/storage/akitio-thunder3-pcie-ssd-review-blazingly-fast-external-storage-for-rich-kids.html