You take the whole folder and copy it to a back up. Don't use CWB ,, they are no longer necessary.
Just copy your project folders.
Or us "SAVE AS" and point it to a different drive.
And just one back up is not enough,,, that will be the day a power surge takes out your main HD and the USB drive too.
My own work I can always redo , but any performances by clients I'm backing up to the max.