If you turn on the Increment On Save option on the of the Preferences dialog, the current scene is renamed by appending a two-digit number to the end of the file and incrementing the number each time you save. For example, if you open a file named myfile.max and then save it, the saved file is named myfile01.max. Each time you save the file its name is incremented, producing the files myfile02.max, myfile03.max, and so on.
You can automatically save backup files at regular intervals by setting the on the Preferences dialog (see ). The backup files are named AutoBackupN.max, where N is a number from 1 to 99, and stored, by default, in the \autoback folder. You can load a backup file like any other scene file.
3ds Max Design scenes can make use of many different files. When you want to exchange scenes with other users or store scenes for archival purposes, you often need to save more than just the scene file.