Extract "Document set"'s all files with certain attributes

Hello everyone,

So I have a huge problem I can't find a way to extract a bunch of files inside every item of type folders that exist in a document set I've created....

Here is the problem detailed :

I have a document set called PaimentReportsSet and it is a document set list with {Title, Code, Description, Amount, Date, Client, Reason} as attribute for each item of type folder.

Inside each folder I have files (means I have for every PaimentReportsSet item folder some files inside), and each file has some attributes {Name, YearEnd, CodeFile, ReasonAdded}. My problem is that I can't find any action that will help me extract these files with their attributes from each Folder in the document set... Any ideas please ? I feel so helpless and it is urgent matter

Thanks in advance !