No file manager, no problem.
Root Explorer is the ultimate file manager for root users. Access the whole of android's file system (including the elusive data folder!).What's New:
- Fixed recurring storage permission dialog problem.
- Click on path in title bar to add full path to clipboard.
- Fixed intermittent crash when opening text files from "Open with" screen.
- Added Nougat-specific user ids in Change Owner drop down lists.
- Fixed problem copying from cloud to external SD card in CM13.
- Support for Magisk v6 and PHH Superuser.
- Support for Android 7.0 (Nougat).
- Material Design UI
Features:
- Multiple tabs.
- Google Drive, Box, Dropbox and network (SMB) support.
- SQLite database viewer, Text Editor.
- Create and extract zip or tar/gzip files, extract rar archives.
- Multi-select.
- Execute scripts.
- Search.
- Remount.
- Permissions.
- Bookmarks.
- Send files (via email, bluetooth etc).
- Image thumbnails.
- APK binary XML viewer.
- Change file owner/group.
- Create symbolic link, "Open With" facility, MD5, create shortcuts.
New Permissions:
- Full network access - Required for network and cloud access.
- No information is passed to us over the internet.
- Add or Remove Google Account:- Used by the Google Drive SDK to add a new account if desired. No changes are made to existing accounts and no details accessed apart from the account name.
- Find Accounts on the Device:- Used to list available accounts for logging into Google Drive.
- Prevent from sleeping:- Used to stop the device sleeping during long operations so they are not interrupted.
Download links:
Google play: 
Userscloud: 
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