To reduce disk consumption, an organization's legal department has recently approved a new policy setting the data retention period for sent email at six months. Which of the following is the BEST…

Creating a daily encrypted backup enables the organization to move emails older than six months from primary storage to a secure, separate backup or archive system. This practice effectively reduces disk consumption on the primary email servers while ensuring that legally mandated retention and retrievability requirements are met by preserving the data.

While deleting emails would reduce disk consumption, it could lead to permanent data loss, which may not align with the legal department's implicit need for long-term retrievability or e-discovery purposes beyond the primary active retention period.

Migrating emails into an 'Archived' folder on the same primary storage does not reduce overall disk consumption on the email server; it merely reorganizes the data.

Implementing automatic disk compression is a general storage optimization technique that reduces the size of files on disk but does not directly enforce a specific data retention period or allow for the removal of older data from the primary system.