It matters on just how those files have been handled. The stories that they had 1000 FBI agents pouring over it would mean that there are a lot of copies out there and you would be right. If that was an exaggeration, or if they classified the material, then they probably have some strict control of it and know where the copies are and who is handling them.
Since we have not really seen any leaks yet, I think it likely they have successfully controlled the documents and if so, have probably already destroyed any that were bad for the Trump administration.