Since there is only one usb port please check if it works with a usb hub. Check also for the maximum number of external hdds that can be mounted by the unit. I want to see how this compares with the U1 that can mount only three external hdds. While you're at it please do check if mouse and hdds can work together thru the usb hub.
Regarding the USB hub, this will have to follow, as I do not have one available. I shall purchase one and will update you.
Pending queries:
1. Check if the Hub works with a USB hub attached.
2. Check how many HD's can the Hub access with a USB hub attached?
3. Check if a mouse and keyboard can work on the USB hub.
On the number of HD's that the Hub can access, I have a ProBox with 4 units x 2TB HD's = 8TB of storage filled with some good stuff. I attached it to the Hub and it was not able to access/read the ProBox
On the flip side, I attached my 2TB HD and it was able to read its contents flawlessly