Samsung's new X5 portable SSD is equipped with Thunderbolt 3 and is a screamingly fast. According to the company, the drive can transfer at 3 GB video in just 2 seconds and a 20 GB video in only 12 seconds.
https://www.notebookcheck.net/Samsung-s-new-external-NVMe-based-TB3-X5-SSDs-are-screamers.326334.0.html