The Android OS is not outwardly file based. There is no innate capabilty in Android to save files to a filesystem. Applications by themselves may optionally implement a file based solution, but some may not. Sometimes the only way to save files in an application is by sharing them to other applications. For example, if there is an image generated by an application, I have share that image to e-mail, e-mail it to myself, and then save the file attachment in my downloads folder. This is alot of steps just to save a file. This application makes it easy for you to save files to the file system without having to rely on alot of steps to save a file. This application allows you to save files directly to the file system using android's share dialog.