What is the function of the SlingStudio USB-C Expander?

The SlingStudio USB-C Expander connects the USB-C port on SlingStudio to two additional USB 3.0 ports for recording, and one 1 Gbps Ethernet port for broadcasting.

You use the USB 3.0 ports to record your SlingStudio content, while the 1 Gbps Ethernet port provides a wired option to broadcast your SlingStudio content.

We recommend that you use the SlingStudio USB-C Expander with SlingStudio because other USB-C extenders may not be optimized for multi-camera video production.

Here's some additional information:

Connecting more than one hard drive to SlingStudio