Gmail Backup Tool

This tool provides authorized, ongoing archives of Gmail data for individuals and organizations. It connects via OAuth and retrieves emails, contacts, and calendars based on user selections. Backups are stored locally or in a chosen cloud destination and are designed to support migration, compliance, and disaster recovery.
Conceptually, backups are incremental: the tool tracks a last backup timestamp or historyId and only retrieves new or changed items, reducing bandwidth and API usage. Data is written to standard formats (MBOX, EML, JSON, ZIP) and can be encrypted at rest. Validation checksums verify integrity.
Key differentiators include label-scoped backups, scheduled runs, retention policies, and portable artifacts suitable for archiving or restoration in other tools. It supports admins managing multiple mailboxes and individuals seeking offline copies. The approach uses OAuth with least privilege and adheres to data-protection best practices.
Use cases include pre-migration to another provider, eDiscovery retention, legal hold preparation, personal archiving, or compliance audits. Outputs include a manifest describing contents and a verifiable checksum for integrity, ensuring reproducibility and auditability.