This question is practically unanswerable with Windows on-board resources in established structures. migRaven.24/7 solves the problem by scanning the NTFS file owners and providing an overview of who created how many files in a directory. The user who created the most files is either the data owner of the directory or knows the data owner. In the next step you can migRaven.24/7 Webinterface simply assign the data owner rights to the identified file owner.
From this point on, the data owner can become active himself and decide that, for example, certain directories can be archived obsolete and ad hoc, authorizations must be adapted or archiving policies should be assigned to specific directories.