Restored Adobe Files do not open

[Sherrill5EDA]

I have restored some Adobe Files multiple ones from a backup replication and they will not longer open. 

I don't know what I can do to fix the problem? 

[Bernd Alheit]

The files are damaged. What can you see when you open a file in a text editor, like Notepad?

[Sherrill5EDA]

Nothing will open in in notepad on one of the test files.  It will display the file name in the task dialog box and that's it. 

[Bernd Alheit]

The file is empty. A empty file is not a valid PDF file.