The read/write speed on my PC on 3.0 port is 60mb/s
But my thinkpad x220 on 3.0 port is 30mb/s (like a 2.0)
My x220 use win 8 64 Bit, I've installed http://download.lenovo.com/ibmdl/pub/pc ... y210ww.exe but no used.
what happened to my USB 3.0 port
yes I'm sure. May be the controller don't detect. On my PC, it has "USB 3.0 Extensible Host Controller" but my x220 is just recognize as "Mass storage device"dr_st wrote:Welcome to the forum.
Is the USB3 controller detected in the Device Manager (you should have an xHCI device there)?
Make sure the cable is firmly plugged all the way into the USB3 port (unplug and replug).

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