check pip install django-filer\>=3.0 different sizes; Django MPTT [https://github.com/django-mptt/django-mptt/] manages the tree structure of the folders in Django Filer. Pillow, the Python imaging library efficiently handling tree structures in the database. In 3.1, Django MPTT [https://github.com/django-mptt/django-mptt] has been replaced by django-treebeard [https://github.com/django-treebeard/django-treebeard] Note Backward incompatible change While most of the low-level interface is very similar between django-mptt and django-treebeard they are not exactly the same. If any custom code needs to make use of the