I bought my iMac mid 2011, and my hard disks usb3: 4GB files loaded in less than a minute, that's changing me yet fast Firewire 800. The Belkin is relatively discreet despite its large volume. A fault? yes: the AC adapter is huge ... (the same as on my hard drives, there is 10 years old ...) Suddenly, the volume is multiplied by 2 Belkin, hard to hide this half ... Thank you for his ability and his many qualities.