Organize files attached to a node into folders We need to organize files attached to a page into folders (with Drupal 7). They don't necessarily have to be physical folders, virtual folders are fine.

Do you know a module like this, or do we have to implement it our own?

Update:
To be more specific: we need the ability to display attached files on the page organized into folders, the underlying filesystem structure is indifferent.
Just make a taxonomy vocabulary to simulate the folder structure. Install File Entity module. It makes fieldable files, so you can attach taxonomy for the file own - with the module Media you can do that during editing the node.

To display files grouped by folders, you can make a view to do that, and use EVA to embed it into the node. In the view you have to make a 'File' based view, just add a relationship to the node, and add a Content Id contextual filter, which use that relationship.