juno,'Files' app, is it possible to go back to previous or upper level folder, by press 'backspace' key? BR.
Alt left/right right is the keyboard shortcut for moving through history, just like in browsers.
<Alt>Up is the keyboard shortcut you're looking for. As far as I know,
backspace does nothing. If you want to change the keyboard shortcut, I think your only option is to change it in the source code and compile locally.