OK but from a brief look at the link it may be that the usb sockets are electrically different, you would need to google 'usb 2 specifications' to research further, sorry I haven't time to do this for you now, going to slave over a hot stove :-)
Found this on Ebuyer site about this unit, so my friend is not alone with this problem.
"However, the most recent 2+4 version seems to have the max voltage set lower than the 2+3 version nearer to the USB specification of 5-volts. All the flash memory works well but the external hard disk won't run as it requires a little more ummmphh, so it's back to fishing around the back of the PC for the m/b USBs. In conclusion if you plan to you these with digital cameras, flash memory, no problem but external 2.5" drives may not work."