Renaming all files in a directory but keeping extension

[EONECS]

Need help on renaming all files in a directory?

I have a folder directory called

XXXX_folder_name

in this folder i have more folders and some files

How can I rename everything (files and folders) with the filename XXXX_folder_name keeping the original extensions

Thanks

[Stefan]

I can only provide a halfway, folder-wise solution:

File(2) Name [Remove]
Append Folder name(9) Name [Prefix]







I guess something like this I get in my mind:

Origin:
XXX\
----sub folder\
--------file.txt
--------file.jpg
--------file.mp4

Pass 1:
XXX\
----XXX\
--------file.txt
--------file.jpg
--------file.mp4

Pass 2:
XXX\
----XXX\
--------XXX.txt
--------XXX.jpg
--------XXX.mp4