After changing the names of project and module in idea, why have the files on the hard drive not changed?

what"s the point of modifying the name of project and module in idea?

Mar.04,2021

rename directory is to change the folder name

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e48d7a-4403f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e48d7a-4403f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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