This has bothered me a little—been stuck trying to figure this out since I saw your question. From online resources, it seems you are not supposed to make them in secure folders—as you will not be able to get them. It's odd, as when you make one, you can see the others you have made while in the secure folder, but they are not obtainable. I've found older posts on here about this topic unresolved. So, to me, you can't. I would go to the Samsung Members community, support, feedback, and speak of this.