When comparing Deepin File Manager vs nnn, the Slant community recommends nnn for most people. In the question“What are the best Linux file managers?” nnn is ranked 1st while Deepin File Manager is ranked 13th.
Ranked in these QuestionsQuestion Ranking
Pro Send files and folders to external drives just from the right click menu
Pro Supports natural sorting of file names
The only other file manager that supports this is Dolphin.
Pro Beautiful UI
Pro Written in Qt
Pro Has dark theme support
Pro Rich set of plugins
Pro Extremely lightweight (120 kb)
Pro Unique navigate-as-you-type mode
Pro Awesome new features being added in every release
Pro Minimal configuration with sane defaults
Default options and navigation is simple to grasp.
Pro Has a great wiki
Save and resume sessions.
Pro Supports cd-on-quit
Allows for quick switching between nnn and the terminal.
The file manager has recently added support for preview hovered files using various methods.
Pro Integrates with the desktop environment and opens files in the default applications
Pro Reasonably well-documented
However, it requires some prior knowledge of inner workings of Linux and there are no tutorials (yet). NNN author is making up for this by actively responding to GitHub issues.
Pro Customizable icons and colors
Kind of in between nautilus and pcmanfm.
Con Extensions not supported
Currently it does not support script extensions. It would be more useful having plugin to integrate with Dropbox and git.
Con Lack of compact view mode
No compact view with small icons, labels to the right, and multiple dynamically sized columns. This is a standard UI idiom. What is their rationale to not support it?