The best portable SSD: SanDisk Extreme PRO Review - 9to5Toys
SanDisk Extreme Pro 1TB Portable SSD Review
Amazon.com: SanDisk 500GB Extreme PRO Portable External SSD - Up to 1050MB/s - USB-C, USB 3.1 - SDSSDE80-500G-A25,Aluminum Enclosure–Transfer Speed Up to 1050MB/s* : Electronics