Used with USB3 controller card (), the flow rate was equivalent to the USB2 (20Mb / s) on having connected this card controller on a PCI 4x port. The problem was solved by putting the controller on a PCI card 8x port. I did some tests between an internal HDD SATA I and this disc, and internal HDD transfer rates to that external drive are: - Between 110-130Mb / s for a file up to 5GB - From 110 to 90MB / s for a 35GB file So this disk "1st prize USB3" is very well made (and the controller).
