File Expert is one of the best Android file managers with root explorer included. It’s a free app, though it does have a paid version too. File Expert comes with a plethora of functions, including the ability to backup Android apps as apk files.
It has a user manual too and it needs it, considering the number of features it comes with.
Some of the features include using it as a sharing server over WiFi, so your friends can access your files, Text Viewer, Image Viewer, SD card search function, File Picker, Theme support and Thumbnails.
It’s been downloaded over 6 million times and it has mostly positive reviews, being recommended by most of its users.
File Expert can help you manage your cloud accounts, so you don’t have to install multiple applications for all your cloud hosting accounts. You can also access SMB, FTP, SFTP, FTPS, and WebDAV using this application.
You can send files through NFC, WiFi and WiFi direct using File Expert, which is a much faster way than through Bluetooth.
The App manager function allows you to install, uninstall, backup and restore apps from your Android device. Apps are backed up as apk files and can be even restored on other Android smartphones.
One more very useful function is the ability to compress and uncompress zip files.
Download File Expert here.