Once received, I was eager to put into service I go out of its package and I ... Plugge not recognized by Windows 7. Finally after research I find that you have to download the drivers from the manufacturer website. I install the drivers. It is acknowledged. I plug my external HDDs and started making my sycnhronisations. And there is the drama, disconnections, cuts, forced to restart my synchros several times. Unable to load any device on the two red USB ports yet provided for. Edit of 03/06/2014 The manufacturer turned to me a copy, I received and that I have not been able to test, because of profesional moving. I planned to take care of his case this weekend. I will certainly keep you informed of the results. Nevertheless I would like to highlight the support SpringRain who has not offended by my negative comments and sent me a replacement copy without having to trigger a box from Amazon. Edit of 11/03/2014 I've tested the product and I must say that it does the job and that is what is asked. Therefore I was the note. I post also a special mention for Alice Spring Rain to thank her for having considered my case. This is a brand that focuses on its customers. As long as it lasts!