Control F - It is useful to search a file by name and type of extension. "Control F" helps you to filter files, by just typing in their name and here you can choose file type. Key Features. Instant search results! You can Share. Supports SD card, USB card. You can open files with other apps. You can search 25 types of extensions. Audio search ={". Mp3", ". Wav", ". Ogg", ".