Geez.

This is another case where Trump's ignorance is going bite him in the butt. Any system that holds vital state secrets is not only going to be encrypted and hard to crack, it will be backed up. Trump may order his minions to delete the transcripts, but you can bet there will be permanent copies on a CIA/NSA server somewhere.

By trying to hide the transcripts, Trump has ensured they'll live forever. First the House will try to get them, and Trump will shrug and say they don't exist. Then they'll subpoena whichever agency maintains the White House server for the backups, and add attempted destruction of evidence and obstruction to the charges.

Sweet.