Hi all,
Thanks for replies.
I was wrong, the original file exists in the source (thank god).
I got confused because the corrupted file in the destination has altered filename, thus I concluded that this is an unique photo and now only in the destination folder.
Sorry for false alert. However, it might still be logical to automatically erase the partially copies file in the destination when the operation cancelled.
I found the logs, but they seem to have lots of information of my fileshares etc. compuert and folder names I'm not confident to share, however, they may not be needed since this is not a critical bug after all.