How To Copy Files Without The Folders (Folder Flattening)
How to copy files without the folders (folder flattening)
Enter the common root folder and do a search for all files (i.e. search for *).
When all files are found, mark all files, press Ctrl + X and navigate to the common root folder again.
Now press Ctrl + V to paste all the files into the root folder. When finished, delete all subdirectories.