We recommend the Anker A8365 USB hub, which handles USB C Power delivery, gigabit ethernet, and USB ports for flash drives:
If you are trying to boot a machine with USB 2.0 Type A ports, we recommend these USB A to C adapters:
With those two items, you can boot anything which can boot into WipeOS, including the 2015 Macbook with only 1 USB-C port, Windows Tablets like the Microsoft Surface, and many other models. This setup has the fast speeds, and compatibility with USB2.0 devices.