Delete Sample Data"" button on the home page. How do I remove it?

Ok, I'm less unsure at this point than when I asked the question. I made the copy as suggested and I'm glad I did. First, I edited items on the original and made sure I made changes or just hit save when I was in the edit function on any items I wanted to make persistent. After I hit "Delete sample data" it did delete anything that was related to "user" task data in my KanBan App. But it also deleted any data related to things like icon information that you would assign to each task type down to the URL info that each icon was associated with. I didn't expect that. Just to summarize it looks like this is a big hammer action and goes deep into what data it removes. Tread lightly as my app would have been almost unusable if I didn't have the copy.