A file managing apparatus of a switching system includes: a flash memory for storing files used in the switching system: an SRAM for storing the files, which are frequently changed and used, among the files stored in the flash memory; and a central processing unit for storing data in a predetermined area of the SRAM when data related with the files stored in the SRAM is processed, and then reading the stored data periodically, to back up the read data in the flash memory.

 
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