There are many ways to IMAP backup Tool. You can do it manually, but it's too time-consuming and risky for the original files. I can suggest the best tool because I use it too. You can use the TrustVare IMAP Backup Tool, which allows you to download Gmail emails and save them in the local system. The software exports data in multiple file formats like PST, EML, MBOX, and MSG without any issues. It will preserve your email data and formatting during the backup process. You can use the tool without technical skills and try their free demo versions before buying the tool. It can work with all Windows OS versions like 11, 10, 8.1, 8, and 7 without needing any application.