This is a usb 3.0

Not possible to publish a screenshot in this context but the performance test revealed this:
average reading -speed 128.4 MB / s (on usb3 port) and 46.2 MB / s (on USB2 port)
average write -speed 6.3Mo / s (identical on USB2 ports and 3)
not great writing but given the size of the key (and the price) I expected!
for revenge in reading speed, I was dazzled!
I use this key as live-boot linux on OpenSUSE KDE and it turns out to be MUCH FASTER than the same version engraved on my hard drive (and of course that Win7).
I take my hat !!!