Method of managing files of a portable information terminal according to available memory

摘要

A method of managing files of a portable information terminal and automatically upgrading a program installed on the portable information terminal to the most recent version. The method consists of comparing a memory size of files to be changed in the portable information terminal with a size of memory available in the portable information terminal, generating a list of files to be changed, updating information on a memory size of the portable information terminal in a master server when the files are to be changed in the portable information terminal, and storing the generated list of files in a specific directory of the master server and transferring the list of files to be changed to the portable information terminal when the files are transferred to the portable information terminal.