You are so right about that cant work but remember when you buy the device inside of box have user guide and there show you all passport drives need to connect in back of device via usb and all massive devices (portable 3.5) need to connect on side of device via usb.I have right now 7 terabyte(3.5 inch 3x 2tb wd +1tb wd on side connect and in back of device 2x 750 wd passport .they all work very good with out any problem but dont forget when you connect more then two devices you need to use multi usb with adapter ,if you use direct connect to multi usb with out adapter will not work because the device cant gived to same energy to all hard disc. i hope this help samething