With the help of Applescript you will be able to join the folder files in just one

It has happened to many of us, that we received a binder full of others folders loaded files, you must then gather the files in only one binder, doing it manually is wasting your precious time, but the application apple script to give us a hand in this tedious task.

The first step is to open the Script Editor found in Applications / Applescript. A new window will appear; there copy and paste the following:
tell application "Finder"
activated
set theTopFolder to (selection as aliases)
–Display dialog (theTopFolder as text)
repeat with EachSubDir in (get every folder of folder theTopFolder)
try
–Display dialog (EachSubDir as text)
repeat with Eachfile in (get every file of folder (EachSubDir as aliases))
try
move Eachfile to theTopFolder
end try
end repeat
delete folder (EachSubDir as aliases)
end try
end repeat
end tell.

Use the script, after choosing the binder you want in the Finder and note that the script just locate files in the folders first level; In good Spanish, this means that if within a binder first level there is another binder, this subfolder will go straight to the trash with its internal load of files.

If this work is something everyday for you, then you can save the script and if for example you want to compile all files Relating to a print job that is filed in multiple folders will be helpful as well.

Via | Faq-Mac