Simple way to backup all Gmail accounts into several file format is TrustVare Gmail Backup Software. All emails and attachments from Gmail Mailboxes can be simply backup by users without any data loss.

The main characteristics to advance:

It lets users at once back up several Gmail accounts.
Users of this utility can backup entire email contents including attachments and emails.
Backups can be set to execute automatically at chosen frequency and time.
Save your Gmail data as PST, MBOX, EML, EMLX, HTML, PDF, and MSG among several file formats.
To backup rather than the whole mailbox, you can choose particular folders and email items.
Before storing the Gmail data to your local system, show a preview of it.
Supports any variant of Windows OS.

System Needs and Technical Details

Supported OS are Windows 11, Windows 10, Windows 8.1, Windows 7.
RAM (4 GB advised)
Free Hard Disc Space: 200 MB or more

Visit here: https://www.trustvare.com/imap-backup/