ReadonlynameThe read-only name property of the FileSystem interface indicates the file system's name. This string is unique among all file systems currently exposed by the File and Directory Entries API.
ReadonlyrootThe read-only root property of the FileSystem interface specifies a FileSystemDirectoryEntry object representing the root directory of the file system, for use with the File and Directory Entries API.
The File and Directory Entries API interface
FileSystemis used to represent a file system. These objects can be obtained from the filesystem property on any file system entry. Some browsers offer additional APIs to create and manage file systems, such as Chrome's requestFileSystem() method.MDN Reference