I've been searching the forum for a while but could not find a decent solution for this (quite simple) issue.

I would like to give site editors the option to uplad a file or files to a document.
Of course I've started with the Multiple Media Picker data type (and also the Upload as well), which both work ok .

However, it forces the uploaded files (pdf files in my case) to be stored in arbitrary folders (e.g. /media/1051/file_name.pdf) where each uploaded file is stored on its folder (under /media).

I would like to force the uploaded file to be stored in a specified folder, either selected by the editor or somehow managed by code -
Of course the only use of this feature is to keep the site external files to be stored a clear and structured tree.

Is there out of the box solution for this case ?