Not every Android app stores files with Content://Cz.Mobilesoft.Appblock.Fileprovider/Cache/Blank.Html . FileProvider system. The File Provider system is an alternative that developers can incorporate into an app to share files or keep them in safely. Other apps store images or documents on or in the cache along with the FileProvider and ignore it altogether. All applications are constructed differently. AppBlock does that to maintain things and not to have potentially embarrassing situations, but other applications might employ a different system to the same effect.