He's kept it on a government computer, and he was egotistical enough to want to preserve the real story for posterity.
The purpose of the hearings is two fold:
1) Shed the light of truth on the COVID Shut Down so that such mistakes never happen again and so govt safeguards against future abuse can be developed.
2) Prevent a man who caused more death and morbidity and financial damage than any other man in US history from walking away scott free.