When comparing FreeCommander vs Q-Dir (the Quad Explorer), the Slant community recommends Q-Dir (the Quad Explorer) for most people. In the question“What are the best file managers for Windows?” Q-Dir (the Quad Explorer) is ranked 3rd while FreeCommander is ranked 12th. The most important reason people chose Q-Dir (the Quad Explorer) is:
Every window can be separately customized. You can choose between different views from 1 to 4 windows, and every window can have multiple tabs!
Specs
Ranked in these QuestionsQuestion Ranking
Pros

Pro 2 Pane Layout
Makes normal file operations (like move & copy) easy.
Pro Quick Navigation
Commonly used folders can be added and accessed using the favorites list -- in addition, physical and network drives can be switched to with a single click.
Pro Very powerful Multirename tool

Pro Has a portable version
Because it's portable, you can easily move the folder with all your files to other devices.
Pro Powerful search feature
FreeCommander provides a search functionality that allows you to filter out results.
Pro Very powerful set of file copying options
FreeCommander has a very powerful set of file copying options.
Pro Very usable and reliable Sync tool
Pro Shows folder file size
In Details mode you can turn on Folder Data file size.
Pro Keyboard shortcuts
Has a good set of keyboard shortcuts enabled by default
Pro Interface highly customizable, native Dark Mode, stable, very accessible primary functionality, very frequent updates
Simple 1-click buttons to toggle views, enable or disable visual filter, etc. Very simple instant filtering. The folder syncing is as good as "GoodSync".
Pro Excellent file manager with lots of hotkeys
Also file search, filter and multi file rename functionalities.
Pro Highly manageable multiple windows
Every window can be separately customized. You can choose between different views from 1 to 4 windows, and every window can have multiple tabs!
Pro Does not use a lot of RAM
Q-dir with 4 windows and with 4 tabs in every window uses only 39mb of RAM on Win10x64.
Pro You can use tabs in every window
Pro Free
Pro Portable
Pro You can view 4 windows simultaneously
Pro Fast and stable
Pro Very customizable
Pro Q-Dir allows you to save folder combinations as a favourite to open any time
Up to 64 folder combinations can be saved in a favorite, since each of the four windows is equipped with tabs (ie 4 x 16 tabs 4 x Tree View plus 4 x Address Bar).
Cons
Con It's easy to delete important stuff by accident
When you want to delete something, it will often highlight both a file and its folder. The whole folder is then removed if you don't de-select the folder manually.
Con Only the 32-bit version is free
You have to make a donation to be able to download the 64-bit version.
Con Cluttered and dated UI
The user interface has an outdated look, with a lot of button and menu options that can be overwhelming.
Con Unable to replace default file explorer
Con Buggy
Good facilities overall, but there's a bug that makes menus freeze and get stuck on the page.
Con Sometimes may have bugs
Con No search
Con Needs modern UI design
