When Incremental Save is turned on and you save the scene, a backup folder by the same name is created in the scenes\incrementalsave folder and a backup is made of the file that was previously saved to disk. Each time you save, another backup file is created. These backup files are incremental (filename.001.mb, filename.002.mb) so the previous backup is not overwritten. The number of incremental backups created is infinite by default.
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