We prefer Google takeout as the best free way to backup Gmail Emails. Ofcourse you can use any free method mentioned above. Conclusion: Best way to backup Gmail Emails. Robo 3T (formerly Robomongo) is in top 0.008% of all repositories on GitHub, regardless of technology. We are proud to have such community recognition, even when compared to world-famous projects, such as Google's LevelDB and Facebook RocksDB.