you can try this software for back up your G-suite account, I am using this software from last five day ago before this software I do not have an idea to back up so I started to search on google after analyzed many utilities, then finally I got this software G-suite backup which suite my requirements.this tool has a simple and easy interface to use and I got the satisfied result form this software. That's the way I suggest you try this software for back up your G-suite account if want to use this or move to other utility go ahead choose which suite you best. I am providing the link below the post visit here for more detail: Google Apps Backup Software for Google Emails to Outlook
You can backup your Google Apps emails easily with the help of third-party software. There is a lot of software are available in the market but most of them are not secure. From my personal experience of using the backup tool, I like to recommend ToolsGround Email Backup Expert software which helps you. This will help you to secure your G Suite data, especially during the migration process.
More Info;- Email Backup Expert - Advanced Wizard to Backup Cloud Emails Online