I installed my Buffalo Drive Station Duo and everything was working well. The USB 3 transfer went smoothly for my first big transfer. After shut down on the first day and restart on Day 2 the computer pops up that my divice will perform faster on a USB 3 port which is what it is connected to. It lost the USB 3 funtionality. I have an Asus P6X58D-E motherboard with USB 3 built in. Everyhing looks good in divice manager. I'm running Win 7 64