By default, the program creates a [drawing file name].bak file when you save a drawing. When you save, the current drawing overwrites
the previous version. That previous version is saved as the backup file, should you
need to restore the drawing.

1. Right-click the drawing area and choose Options.
2. On the Open and Save tab, under the File Safety Precautions heading, select the Create
   Backup Copy With Each Save check box.

Learning AutoCad

default, the program creates a [drawing file name].bak file when you save a drawing. When you save, the current drawing overwrites the previous version.drawing area and choose Preferences. On the Application tab, under the Application Preference dialog box, select the Automatic Save check box. If you do, each time you save a drawing, the previous version of your drawing is saved to a file with the same name and a .bak file extension.Backup (bak) Files Automatic Save (sv$) Files Temporary (ac$) Files Drawing Recovery Manager Backup (.bak) Files Drawing backup files are typically created  …drawing backup file. Computer … To Control the Creation of Automatic Drawing Backup (.bak) Files · To Save a Drawing …automatic saving and backup files and save only selected … If you want to create a new version of a drawing without affecting the original … File Type · To Control the Creation of Automatic Drawing Backup (.bak) Files …