Django Custom File Storage system

You can put it anywhere, but you should point the path to there in the settings.py

You can put this storage.py file in the root folder (the one that has manage.py) and point the path as storage.AlwaysOverwriteFileSystemStorage

You don't need to put anything in your settings.py. Just use it directly in your model. For example, create storage.py wherever your app is located and put OverwriteStorage() in it. Then, your model could look like this:

from storage import OverwriteStorage
...
class MyModel(models.Model):
    ...
    image = ImageField(upload_to='images', storage=OverwriteStorage())

I am also using a custom storage system to overwrite existing files. My storage.py looks like this:

from django.core.files.storage import FileSystemStorage

class OverwriteStorage(FileSystemStorage):
    """
    Returns same name for existing file and deletes existing file on save.
    """                                                              
    def _save(self, name, content):
        if self.exists(name):
            self.delete(name)
        return super(OverwriteStorage, self)._save(name, content)

    def get_available_name(self, name):
        return name