WINDOWS 11: How do I expand and show all my folders and their files in one window?

I want to clean up multiple copies of the same files and folders etc by deleting or drag and drop to existing folders.

Re structuring my work PC. (question from 2012, mine is not so different, checking folders/files in different drives in WINDOWS 11)

So I want to expand each folder on a drop-down tree view to see their contents (folders + files) not needing to enter each of them to have a glance of their contents and keeping the full picture of the tree in case I have to rearrange folder locations also seeing duplicated files in the same view, since the current option I see is double click on each of my 2000 folders and not being able to easily compare the tree of files between disks (files are not shown in navigation pane) and not being able to see duplicated files since I can only see 1 folder content at a time.

NO, the navigation pane is useless to see folder content, if any.

NO, view folder content option does not show folder content in my tests.

I just want to navigate on the right pane, expanding folders on my different drives to quickly check contents and copy/move files/folders. Here is an example.

https://i.sstatic.net/80xrT.png

Have a nice day