The design has 2 internal notches to securely hold the dongle by the square holes. An internal tab prevents the USB dongle to slide in to the opposite side.

You will need a small keychain ring or a loop so you can attach it wherever you want it.

I used external fuzzy skin, 3 walls and 30% infill.

Pick the correct filament type to your usage.

No, I do not share the design files. Use at your own risk.