Backup files on the device's external storage (i.e. SD card).
The app will allow the User to backup files on their device's external storage volume. This will be done via setting up one or multiple personal 'backup configurations'. Each configuration will have a source path and destination path. The paths will be retrieved via a simple file explorer UI for the external storage volume. Once setup, the User will just need to tap a button for a specific configuration, and it will automatically backup their file(s).