Alternatively, you could keep a microsd card in a ring to safely store key files. https://www.thingiverse.com/thing:1970583 https://www.thingiverse.com/thing:1

Alternatively, you could keep a microsd card in a ring to safely store key files. https://www.thingiverse.com/thing:1970583 https://www.thingiverse.com/thing:1970583