Save Copy As allows you to save a copy of the current scene under a different file name. It does not change the name of the file being worked on.
Important: Save Copy As does not update the original file name as Save does, and Save does not update the file you last saved using Saved Copy As. For example, if you make edits to a Autodesk VIZ scene named filename.max, then use Save Copy As with the file name filename01.max, make additional edits, and then click Save, your second set of edits will be saved as filename.max but not as filename01.max.
Save Copy As displays a standard Windows save dialog. Save Copy As increments the number at the end of the file name in order to propose unique but similarly-named files each time the command is used.
Clicking the Save button saves the file to the name displayed in the File Name text box.
Tip: You can resize the dialog by dragging an edge or a corner.
Clicking the plus button saves the file with a name ending in a number one increment greater than that displayed in the File
Name text box.