Merging Many Folder together

Solution
What do you mean as "Merge"?
Are these folders at same level? Do they have sub-folders?

If this is one-off task, you can try something along these lines:
- open command prompt, go to the folder containing subfolders
- execute "DIR /b >folders.bat". This will create a file with all the files and subfolders.
- Edit a file, leave only folder names in it.
- Make each line of this file to read "move folder/* ."
- execute resulting folder.bat file

You can also create a script using "FOR" command.
What do you mean as "Merge"?
Are these folders at same level? Do they have sub-folders?

If this is one-off task, you can try something along these lines:
- open command prompt, go to the folder containing subfolders
- execute "DIR /b >folders.bat". This will create a file with all the files and subfolders.
- Edit a file, leave only folder names in it.
- Make each line of this file to read "move folder/* ."
- execute resulting folder.bat file

You can also create a script using "FOR" command.
 
Solution