Develop a microSD file management app for iPhone and iPad -- 2

Develop a file management app which has following features: 1) Manage files in app and microSD inserted in a reader (plug to iPhone by lightning) 2) Play multimedia (video, music, photo) files stored in app and microSD 3) Encrypter files (Use iOS API and proprietary crypto libraries) * Developer shall be familiar with ffmpeg. ** Developer shall be familiar with iOS accessory api. (To access microSD) *** Multimedia files will be read from microSD via byte stream. Developer shall have knowledge about how play multimedia from byte stream data. The app shall be similar with [login to view URL]