To avoid doing this every time, you can change your default save format. Go to Options > Open and Save and select an older version in the Save as drop-down. 2. Batch Conversion with Autodesk DWG TrueView (Free)
Type SAVEAS in the command line or click the AutoCAD icon in the top-left and select Save As . dwg to older version
Working with CAD files often leads to compatibility issues, especially when sharing drawings with clients or teammates using older software. Since AutoCAD follows a rule—meaning newer versions can open old files, but older versions cannot open newer ones—knowing how to convert a DWG to an older version is a vital skill for any professional. To avoid doing this every time, you can