HELP so I don’t mess things up: Backing up emails by copying MBOX files in Library>Mail?

HELP so I don’t mess things up: Backing up emails by copying MBOX files in Library>Mail?

Hello, I might actually use some assist so I don't by accident delete years value of emails.I use Mail.app for my e mail shopper on macOS 12. I have gigabytes of emails sorted into dozens of folders in the app....