Save scumming refers to the practice of copying your character's *.svg file to somewhere else on the hardware (usually a seperate backup folder), in order to reuse that file should the character in question die in game and have his save file deleted. Batch files may be written in order to automate the process. Backing up your game to reload in case of a program crash is not considered save scumming. While technically it allows you to replay parts that you played before the crash, the crucial difference is that the character's death is (usually) your fault, while a program crash is not.