How to transfer notes into the secure folder notes app

[KittyO]

Hi

I've been keeping a diary using the Samsung notes app. I only recently discovered the secure folder which has a secure notes app within in. I'd like to move all notes in a certain category to the secure folder (I have hundreds) but can't figure out how. Within other apps there is a menu option called 'Move to secure folder' but I can't see this in the Notes app.

My notes are meant to backup to my Samsung account, but if I try to import them into the secure notes app it says there's nothing to import.

Can anyone help? 

Thanks!