Can't open pdf file

[peters58768233]

Getting an error :-  

Adobe Reader could not open because it is either not a supported file type or because the file has been damaged (for example, it was sent as an email attachment and wasn't correctly decoded).

[try67]

Are you sure it's a PDF file?

[peters58768233]

of course. i am transferring documents from old laptop to new one via western digital external drive. when they come over they dont open

[try67]

Open the file in a plain-text editor (like Notepad). What does the first line look like?

[peters58768233]

there is no text. it also doesn't show any file size next to the file

[try67]

Then something went wrong during the transfer and the file got corrupt.