I wanted to 4 external Buffalos mini extreme and connect a SanDisk flash drive to a computer with Windows 7 axxiv. The unit worked on no rational or conceivable way drives were recognized now and then, but mostly not, and the box was nonsensical error messages on its own, such as the time limit for the semaphore (traffic lights?) Is exceeded. A major disadvantage would be that not individually turned on or off via a toggle switch, the devices could - if they were recognized as ever.