Since iOS 12 or so, iPhone has a built in files app. Every app can integrate with that. So when I create a file (let’s say chat backup) in app A, I can put it i

Since iOS 12 or so, iPhone has a built in files app. Every app can integrate with that. So when I create a file (let’s say chat backup) in app A, I can put it in the files app. Then in app B (or app A on a new phone) I can easily open that file from the same files app.