Method for recording, reproducing and managing file data on a recording medium

A method of recording file data on a non-rewritable recording medium and reproducing the file data recorded on the recording medium, the recording medium having a directory region, on which a directory for managing the file data is recorded, and a file data region, on which the file data is recorded, said method comprising the steps of:

• recording file data on the file data region such that the file data is sequentially recorded every recording unit, each recording unit having a predetermined data capacity and being arranged on the file data region;
• recording a directory for managing the recorded file data on the directory region;
• detecting, when new file data is to be added into the recorded file data on the file data region to form a series of file data, whether there is a recording unit in which an amount of data recorded thereon during said file data recording step is smaller than the predetermined data capacity;
• reproducing file data of the recording unit in which the amount of the recorded file data thereof is smaller than the predetermined capacity, detected in said detecting step, and storing the file data of the detected recording unit;
• recording additional file data by adding the new file data to the the file data stored at said reproducing step such that the additional file data is sequentially recorded on respective different recording units in the file data region;
• recording an additional directory for managing the additional file data on the directory region;
• and
• reproducing the file data and the additional file data both recorded on the file data region without reproducing the recording unit detected in said detecting step, when a series of data files comprising the file data and the additional file data is to be reproduced by use of the directory and the additional directory.