This article lists the data types that ProBackup backs up for Google Workspace.
What we back up
Gmail threads, including replies, attachments and labels
Google Drive files and folders, in My Drive and in shared drives
Calendars and calendar events, including event attachments
Contacts, contact groups and "Other contacts"
Note: Google Docs, Sheets and Slides are stored as Word, Excel and PowerPoint files.
Which users are covered
You connect Google Workspace with a super admin account, so the backup covers every user in your organisation. You can exclude individual users from the backup, which removes that user's Gmail, Drive, Calendar and Contacts from it. You can also exclude individual shared drives.
Shared calendars are included when a backed-up user can open them in Google Calendar.
Shared drives are backed up only when the connected super admin is a member of the shared drive. Being a super admin is not enough on its own. If a shared drive shows "ProBackup can't access this shared drive" in your vault, add the connected admin account to that shared drive as a Viewer in Google Drive; it is backed up within 12 hours.
What you cannot select per item
Within a user, the four data types are backed up as a whole: you cannot pick individual mails, files or events. Large Drive files are the exception. You can exclude attachments by size or by extension for the whole account, for example "mov" and "mp4", in https://app.probackup.io/settings/data-retention (See How to control your data storage.)
Downloading mail as .eml files
You can download any backed-up mail thread, or a user's whole mailbox, as .eml files that Outlook, Apple Mail and Thunderbird open. See How to export Gmail as .eml files.