Hi Guys, sorry I was wrong. I am getting 120-130 MB/s when I connect external drives to USB 3.0 ports on W520. 95 MB/s was my gigabit speed copying the same file from network share (backup). I must have been copying from wrong location when I checked the speed. I just tested again and I am getting 3...

Dock 4338 & thinkpad w520 usb 3.0 port works at usb 3.0 speeds only if you're using Lenovo usb 3 drivers link below. Tested on Windows 10 with two usb 3 devices (external harddisk 95 MB/s and Startech display link usb to display port converter. 3 monitor setup. All mini display port dell 2415u). Dr...