Abstract: Disclosed is a method for shortening a booting time of digital equipment having a flash memory. When digital equipment is powered on, a master file directory representing file information of user data and a sector state table representing a sector state of the flash memory are created with reference to each header of a plurality of file system blocks stored in a user data area. The master file directory and the sector state table are updated according to a modification made to the user data. When the digital equipment is powered off, the updated master file directory and sector state table are stored a reserved area. Then, the master file directory and the sector state table stored in the reserved area are loaded to the RAM when the digital equipment is powered on.