I put only 3 stars, because of the included cloning software, which led me to buy this drive over another. This is to download, is fast and without contrainte.Mais it does not work well in my case, besides the proposed version is not the latest but obviously a somewhat older version, you are asked if one wishes to make an update .. I scrupulously followed the instructions, but with two different PC Windows 7 64 the same error message appeared with consequent successful cloning but the original disk has lost its boot configuration and could not start Windows after cloning done ... I therefore use this software more, probably a slightly older product and not entirely consistent with what is done later.