Thanks, Iceman! I only recovered this part too. Did you mean the format of other text change, making them unable to be identified by Office? From my experience, though we disconnect USB with computer suddenly, data will sure loss and file will get back to the previous saved state. It is so strange that the file will be damaged this time. That’s what I wondering. Indeed, I tried to contact Microsoft for technical support but I couldn’t find out the related technical supports in Microsoft website and microsoft forums. Again, thanks for you helping me.