Elgato Thunderbolt™ Dock has three USB 3.0 ports. Two are on the back, and one is on the front.
3x USB 3.0 (5 Gb/s, support for bus-powered devices, UASP & USB 2.0 compatible)
With three additional SuperSpeed USB 3.0 ports, your workspace remains organized even when you unplug your notebook. Rest assured that your backup drive is there to provide safety in the background, and don’t keep re-plugging your peripherals in and out due to your computer’s limitations. Even better, an easily accessible USB port on the front of Elgato Thunderbolt™ Dock makes plugging in that client’s thumb drive a breeze, without the need to fiddle on the sides of your perfectly positioned notebook.
You can use these fast USB 3.0 ports, even if your Mac only has standard USB 2.0 ports.