On modern iOS, you can’t touch app containers. On iOS 9.3.5 with Filza, you can:
Move files via WebDAV, FTP, or cloud services like Google Drive and Dropbox. How to Install Filza on iOS 9.3.5 filza file manager ios 935
For users on this specific firmware, Filza is often used to: Install .deb files manually without using Cydia. On modern iOS, you can’t touch app containers