Why do you think it matters? If you think a subpoena is invalid there is a legal process to quash it. Guess what isn't legal: lying that you don't have the subpoenaed documents and conspiring with your staff to hide them.
If the documents were classified, then every member of the Grand Jury would have to have a security clearance to see them. Did they have that?
Why do you think it matters? Go make a citizen's arrest if you think someone saw classified documents that shouldn't have.
Are you stupid enough to think Trump would not have been indicted if he had just complied with the subpoena or made a motion to quash it?
When Trump wins the GOP primary, are you going to vote for him?