Hello.

So I am absolutely clueless here and can not find an option in the wallet (I have the latest version) to allow me to back up the wallet.  I've googled and got this:   https://multibit.org/help/hd0.3/backups.html

I am still scratching my head.  Yeah, I have the original word phrase and all that...but I want to BACK UP my wallet to a usb drive or something in case something goes wrong with the hard drive on my desk top where the wallet lives.  Is there a specific file or files that I need to save on the usb drive?

Please help?

Thank you very much in advance!!