Knowing what you've got, where it is, and getting rid of it when you don't need it is so important.
“Top 10 Records Management Guides for Law Firms Office: Pros and Cons” Posted on April 10, 2017 by Blue-Pencil Information Security:
http://www.blue-pencil.ca/top-10-records-management-guides-for-law-firms-office-pros-and-cons/
Slide deck “Strategies for effective E-mail Management” – has some interesting statistics and useful thoughts (bit dated: 2015): http://slideplayer.com/slide/5740088/
Blog “Email Governance Best Practices” January 07, 2018: http://www.gravityunion.com/blog/2018/1/7/email-governance