110 Mb/s usb 3 hard drive

hi I have the ac68r.. and I think I've seem the hard drive do the 110 Mb/s speed it should be able to get via gbit ethernet and usb 3.0 speed.. but I haven't seen that in a long while.. in fact on average it does 25 MB/s for moving files.. I do believe I saw both dual core processors running at about 80% capacity when I did another movie tonight at the abysmal 25 MB/s..

I've got merlin on board but ahh.. why am I having piss-poor performance?