I ordered the LogiLink UA0125 USB hub to him on a Raspberry Pi to operate B +. On the one hand to the Pi to supply itself with electricity, also operate as an external hard drive on Pi. Both works properly, what, according to my previous experience, is by no means the case with any USB hub. For full 5 stars it would, however, be processed a little high. The connectors and the switch making a somewhat shaky impression. Remains to be seen how he proposes for an extended period.