Email and messages are the most common types of data to be concerned with archiving in financial institutions today. Email archives should also be backed up on separate physical drives to protect against data loss. Google’s Gmail allows for archiving rather than deleting email, but with the amount of storage space, archiving all Gmail messages is sufficient. Google Apps is available for an annual fee to archive emails downloaded to personal computers. Email archiving is important for companies with email servers to archive company emails for security reasons.”]
Source: https://www.govinfosecurity.com/message-archiving-basics-a-767