2019-12-21 00:00:00 Apps require full access to your Android device's file storage as a matter of course, and who really knows what they do with that access? Secure Storage provides secure on-device storage for documents using Android's Storage Access Framework (SAF). You can use your apps to save files to or load files from this storage using Android's builtin secure file browser. For additional security, the optional "file-wall" feature prevents apps from accessing your files without your explicit permission.