Как спроектируешь ООП для файлообменника

class User:
    def __init__(self, username, password):
        self.username = username
        self.password = password
        self.files = []

class File:
    def __init__(self, name, size, owner):
        self.name = name
        self.size = size
        self.owner = owner
        self.upload_date = datetime.now()

class Storage:
    def upload(self, file_data):
        # Логика сохранения файла
        pass

class FileManager:
    def share_file(self, file, user):
        if file.owner == user:
            # Логика раздачи прав
            pass