It is everyone's responsibility and the law does not allow us to erase the company's information. The current problem is that no one sorts or cleans up the information.
Decisions should not be made through email either. Decisions should be made with the help of documents, as they are in the case of financial expenses, where there is real decision-making that includes signatures and authorities who conduct audits. That type of information is easy to obtain.
However, when we are talking about internal policies and directives, or major discussions within an institution, we realize there are a lot of things that should not be there.