Nothing is lost. I assure you there is a backup copy around. I worked in the business long enough to not fall for this BS.
Their lies are so bold that I don’t think they even care if they are believed. They say it so it is fact and Congress has shown that it is unwilling to make them tell the truth and comply with subpoenas. The DOJ is corrupt, so any muscle like the FBI will be neutered or used to further the cover-up. If Congress does not confront the growing Imperial Presidency, they will soon discover they are no longer needed except for ceremonial purposes.