It is usually used to recover unsaved Word files due to a power outage, crash, or system failure. asd file contains a snapshot or backup copy of the currently open Word document which is created by Microsoft Word's AutoRecover tool. And when I open in notepad that file, it shows random symbols, maybe it's corrupted and can't be restored? By the way, that file was restored from my disk. I have tried everything with the word I think. Besides, it can repair corrupted Word document automatically. If you can't find the ASD file or lost Word document, you can use EaseUS file recovery software to scan your PC your recover ASD file. Open and Recover Word ASD with Data Recovery Software Open 'Word' > 'File' > 'Info' > 'Manage Document' > 'Recover Recent Unsaved Documents'. This is another simple way to open ASD file. Open ASD File from Manage Document in Word Open Word > 'File' > 'Open' > 'Recent' > Click 'Recover Unsaved Document'. Use the AutoRecover function to open Word ASD file. Open ASD File via Recover Unsaved Documents