File Manager - Smart File is simple, small, fast and efficient file explorer and one of the best file manager apps. only file manager shows the size of folders across the storages. this app is designed for all Android devices including Phones, Tablets.Smart USB OTG File Manager for advanced users to explore, edit, copy, paste and delete files in the root partition of phone storage for development purposes. explore root folders of the system like data, cache. File Manager - Smart File is a full-