Small to medium-sized businesses need to be concerned about e-mail retention, data retention, and data archiving. 95% of all discovery requests involve e-mails. 65% now ask for other forms of data (office productivity, CAD diagrams, etc). You must be able to not only deliver this information quickly after the request, but also at the request you need to know what you have and state what you are planning to deliver to the request. Data retention and archiving aren’t just for large enterprises.”]
Source: https://www.darkreading.com/database-security/smb-archiving