FILE MANAGING DEVICE AND ITS METHOD, AND DATA RECORDING/REPRODUCING DEVICE AND ITS METHOD

摘要

A recording medium is logically divided to form a cluster. Each cluster records AV (Audio Visual) data. A reference number indicates the number of files which reference AV data. A free space byte map having the reference number is used for determining whether to enable or disable deletion of AV data on a cluster basis. That is, a cluster having the reference number 0 is released as a free area, thus facilitating management of a file and realizing effective use of a recording medium.