Once again I am testing equipment and received last week this 4 Port Hub. Huge data is rarely transmitted or from time to time a hard drive with up to 1 Gb postponed. Have tried me on the device and was really amazed how fast the transfer of hard disk Notebook performed. For people use the multiple devices simultaneously determines a great thing for my simple works range connections the notebook. Among other things, I used the 4 Port USB 3.0 Hub for charging an Iphone s, it works if minimal times no suitable plug at hand.