A file managing method is disclosed. In the method, data is sequentially recorded with a predetermined continuous recording unit basis in a data section, and a flag indicative of addition of file data is provided in directories which manage file data. When data is additionally recorded into existing...http://www.google.com/patents/US5481519?utm_source=gb-gplus-sharePatent US5481519 - Method for recording, reproducing and managing file data on a recording medium