more like a normal HDD full potential is shown on USB 3.0, 70-80MBps is fair for WD green, since it was the read/ write speed...

if TS would try it with higher performance Spinpoint F3 or WD black, the speed would hit the neck of 110-130 Mbps w/o any issues,

and Yes, it seems like the hard disk is bottlenecking the USB3.0 lol