iTWire - REVIEW: Samsung's new portable SSD T5 is alive – and faster!
Samsung Portable Ssd T5 500gb 1tb External Solid State Hd Hard Drive 1.8" Usb 3.1 Gen2 (10gbps) For Laptop Desktop - Portable Solid State Drives - AliExpress
Just bought the Samsung T5 500GB SSD and ran some speed tests against the PS4 slim HDD. Not scientific by any means but got some some interesting results. See comment below. Btw
Samsung Portable SSD T5 Review (500GB/2TB) - The Industry Standard | The SSD Review