This scenario shows how to export logs from Cloud Logging to Cloud Storage to meet your organization's compliance requirements. Organizations face many such requirements for creating and preserving logging files. For example, where Sarbanes Oxley (SOX) compliance is important, you might want to maintain logs for users, databases, and console activity. For more information on the default and configurable log retention periods, see the Cloud Logging quotas and limits.
https://cloud.google.com/architecture/exporting-stackdriver-logging-for-compliance-requirements
