Paranoid much? 
Trump has a history of deleting subpoenaed emails and certain business records and worse, of preemptively destroying them almost immediately when he's engaged in slimy business practices, despite the fact they are required to be kept by law.
"Business owners must comply with government requirements regarding recordkeeping. A company's records prove the amount of taxes it owes, details its hiring practices, shows compliance with regulations and reports many other types of business activities. The amount of time a company must keep these records on file depends on the type of record involved and the time limitations on the underlying activity that the document describes or substantiates." 
The facts that hes destroyed records after they were subpoenaed in law suits wis a matter of record. He escaped charges only because he opted to settle out of court. 

Presidential tweets are required by law to be kept by the President/his administration, not by the public.