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.

When did you last buy a mouse? Did it have a little adapter in the box? There was a time when if you bought a USB mouse, in the box was also an adapter to allow it to be used with the older PS/2 ...

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 ...

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 ...