AutoRecover files have a “.asd” extension and are made while working on unsaved documents, whereas backup files have a “.wbk” extension and are created if the “Always create backup copy ...

There's a cool trick that can help you retrieve lost and unsaved Word documents by searching for .asd in the File Explorer under My/This PC.

Another way to locate AutoRecover files is by searching for files with a ".asd" extension on your device. If you come across any ".asd" files, do this: ...