With root privileges, you can open some folders hidden on the local file manager. It is generally used by people who like to toss, and the file management provided by normal mobile phones is enough. If it exists by default, it is estimated that the manufacturer has not optimized the development of Android software.
Specific functions can refer to Baidu. I'll post one for you.
MT manager is a file manager v 14.05. 18:
* Expand the double-window operation mode of JAVA platform to facilitate the operation of Jiugongge menu.
*root operation: mount the disk read/write only, modify the file permissions and user groups, and browse the system restricted directory (/data, etc.). ).
* Batch copy, move, delete, rename, create symbolic links and modify permissions.
* Powerful search function, supporting the search of file name, file content and size.
* display apk icon, picture thumbnail, support thumbnail cache, and display picture thumbnail in ZIP format.
* Built-in text editor, picture browser, music player, font previewer and script executor.
* Complete zip file operation function, which can directly add, rename and delete files in ZIP without secondary compression.
* Support to open rar files and extract them.
*APK editing function, including editing DEX, ARSC, XML, APK signature and zipalign optimization.
* Other ordinary file operation functions