Just using windows you cannot do that.
A plus sign to the left of a folder in Windows Explorer indicates that the folder is: a Parent folder containing Subfolders within.
To install FFmpeg on Windows, you can download the Windows build from the official FFmpeg website and extract the files to a folder on your computer. Then, add the folder containing FFmpeg to your system's PATH environment variable to access it from the command line.
Look in the Windows folder, it is in there.
CD..
To create a text file that lists the contents of a folder and its subfolders, you can use the command line. On Windows, open Command Prompt and use the command dir "C:\path\to\folder" /s > output.txt, replacing the path with your target folder. On macOS or Linux, use the Terminal and run ls -R /path/to/folder > output.txt. This will generate a file named output.txt containing the directory structure and contents.
It's the System folder. But if you are looking for windows/dos commands you'll find them in the Command folder
Open the folder containing all four files, right-click in the folder window, select "New Folder," enter the new folder's title, click on one file, drag it into the new folder.
On a Mac it is in the iTunes folder in the Music folder. On a Windows PC it is in the Music folder (or My Music inside My Documents on Windows 7).
in the windows explorer window, what appears in the right pane when you click a folder in the left pane?
By default, directories such as the user's home folder and the start menu folders are indexed, but you can choose to index any folder on the hard drive. You can do this by right clicking on the folder you want to index, clicking properties then checking the index check box. Then click ok and let windows index The folder in the background, this shouldn't take long but it will take longer for folders containing more files
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