Copying rekordbox database onto seperate USBS

Hi, I've been using rekordbox for a while now but still cant figure out how to copy the database onto multiple USB's. For example if one USB gets damaged or lost I would like to just be able to plug my other USB into my laptop and have no issues. I use rekordbox mainly in performance mode and have all my tracks etc copied onto multiple USBs as backups but just cant figure out how to copy the rekordbox database onto my multiple USB's.