He chose to add storage to his USB mouse but didn’t want to alter ... and it’s along the same lines we’ve seen before with a WiFi dongle in a mouse, or the thumbdrive in a controller hacks.
A USB-based adapter for Ethernet, Bluetooth or some other wireless technology. Functioning as the base station's transmitter/receiver (transceiver), the USB plug is attached to the unit ...
Here’s the short answer: If you want to connect your laptop to a printer, an SD card or microSD card, mouse, keyboard, or legacy 1080p monitor, stick with a basic 10Gbps USB-C hub/dongle.
but the USB-C dongle works well and can be plugged in without worrying if it's right side up. I like to use both wired and wireless modes as it suits me, so I prefer having the cable and mouse set ...