To Restore a Drawing From a Backup File

Change the extension of a BAK file to DWG in Windows Explorer or File Explorer.

1. In Windows Explorer or File Explorer, locate the backup file identified by the .bak file extension.
2. Right-click a file and choose Rename.
3. Enter a new name using the .dwg file extension.
4. Open the file as you would any other drawing file.

Display File Extensions in Windows 10

If file extensions are not displayed in File explorer, you need to display them so you can edit the .bak file extension.

1. Start File Explorer.
2. Click the View tab.
3. Check File name extensions on the Show/hide tab.