USB 2 as I waited almost ... I do not know why but I saw little less than it actually is. When you insert a port, there remains almost nothing protruding up and out, not very practical anyway. I put it on a tie that I wear around my neck. And now more worry for out of the harbor. Possible to mislead, to make her fall ... From an efficiency point of view, I would say that it is generally slow but I have an old computer with more than 10 years (usb1) !!! Finally here is the average of my tests "transfers":
My computer (emac) key to: 5.01 MB / second, 3'33 "/ GB Key to my computer: 8.05 MB / second, 2'07 "/ GB
except miscalculation ...
On my son's computer (pc with USB2) to key: 7.60 MB / second max, or 2'22 "/ GB Key to computer: 20.4 MB / second max, or 1'22 "/ GB
In short, it takes a bit of patience.
Question finishing / manufacturing materials: nothing to say, I feel good equipment, robust and well crafted / finish. Finally it is a USB key, not much to say.
