I have recently moved some 2000 photos from my phone to my external hard drive as back up and when I tried to open the photos from my external hard drive using Windows Live Gallery some of the photos came up to be empty and showed that it cannot be displayed because it is an empty file (0 mb).

So if anyone has any idea how to retrieve these photos back, that'd be great as these are the only copies of the photos I have and I'm really regretting not having it backed up elsewhere before transferring. I am using Windows 8.