I'm thinking of adding an external SSD solution to my 2015 27inch retina iMac for my photo editing (Lightroom) and video editing (Final Cut Pro X) need. My editing hobby need can be satisfied by an external 1TB SSD since my projects are not that big each time. I'm considering Samsung T3 and 850 Pro with around $400 budget. Which would be a faster and more reliable option to take? With my photo library, random access speed is important. Also, specifically, I'm curious to learn how T3 compares to 850 Pro connected with SATA to USB3 converter.