Changing a template erases all content.
I wonder what is the best way to save all content before changing a template so I can access the content to put it in the new template design.
Why would you delete the content of a website for a new template if you like to keep it? Just create a new website and add the template to the new site and keep the old one 
Thank you Andre for your reply.
I would still like to know.
I’m at the design stage of an unpublished website. Imagine I want to keep my content, but do not want to keep its template. If I change templates, the content disappears.
How can I best save my content so I can use it with the new template?
Thanks again