Is it possible to recover files in my situation?

Question

Windows Server

Good afternoon! Such an incident happened: the user had Word, Excel, etc. files on the disk. The person decided to "back up", went to a remote site via rdp, on which his own hard drives are automatically connected, and started copying. Those. I selected the necessary files from my PC, opened the remote control and uploaded the same files to the same connected disk. The result is that all the files that were copied do not open - it says "the file is corrupted". I tried to repeat the pirouette to check - the result is the same. The file stopped opening. The question is, is it possible to somehow restore these files if there is no normal backup?