seeking a photo and video restorer

I prematurely cancelled a transfer of photos and videos from my phone's SD card to the internal storage. Now the photos and pics are corrupted and cannot be viewed. there is still meta data on each file, and it still takes up the same space on my device as if it were uncorrupted. No thumbnails are available. It will not play with VLC media player. I have tried free services and software with zero luck. There are probably a couple hundred files to fix.