Hi, I have a new 15" MBP with Touch Bar. I bought a Samsung T3 as external storage, it can be seen here. Basically it is an external SSD which has a usb-c socket, so I can use the regular cable that is was supplied with when working on my iMac, then attach a usb-c to usb-c cable to use it on my laptop. Problems is, transfer speeds are 4x higher on the iMac than the MBP. I don't understand why it would be slower? My other external hard drive is a Lacie Thunderbolt Rugged SSD drive. When hooked up to the laptop (using usb-c -> thunderbolt2 adapter) it is really fast. The reason I upgraded to the Samsung is because it is more compact and doesn't require a dongle, however the slow speed is a major issue. Thanks for your help.