root = {
            "folder1": {
                "type": "folder",
                "content": {
                    "folder1-1": {
                        "type": "folder",
                        "content": {
                            "file1-1-1": {
                                "type": "file",
                                "size": 100,
                            },
                        }
                    },
                    "file1-1": {
                        "type": "file",
                        "size": 100,
                    },
                    "file1-2": {
                        "type": "file",
                        "size": 200,
                    },
                }
            },
            "file2": {
                "type": "file",
                "size": 300,
            }
        }
         
        Print:
        folder1/
        folder1/folder1-1/
        folder1/folder1-1/file1-1-1 100
        folder1/file1-1 100
        folder1/file1-2 200
        file2 300