This article explains which data types ProBackup can restore for Google Workspace and any known limitations.
ProBackup never overwrites or changes existing data in Google Workspace. Every restore adds a new copy from your backup.
Gmail
You can restore a mail thread that has been deleted from the user's mailbox. The thread is imported back into that user’s Gmail with its backed-up replies. ProBackup reapplies stored labels except Trash, Spam and Draft; label application can fail, so check the restored thread. A thread that was not in the inbox or in Sent Mail is placed in the inbox, so you can find it.
Known limitations:
ProBackup does not restore a thread that still exists in the mailbox, including in Trash. The restore report shows a link to the existing thread instead. If the thread is in Trash, move it out of Trash in Gmail.
Individual replies (the Mail replies table) cannot be restored on their own. Restore the thread instead; its replies come with it.
Tip: To get a thread out of your backup without putting it back into Gmail, for example because it still exists in the mailbox or you need to send it to someone, download it as an .eml file. See How to export Gmail as .eml files.
Google Drive files
When you restore a file, a copy is uploaded to the original folder in Google Drive. If that folder no longer exists, the file is placed in the root of the owner's My Drive.
Known limitations:
Google Docs, Sheets and Slides are backed up as Word, Excel and PowerPoint files and are restored in that format. You can open them in Google Drive and save them as Google files again (File > Save as Google Docs/Sheets/Slides).
Sharing settings, comments and version history are not restored.
Calendar events
When you restore a calendar event, a copy is created in the related calendar. Event attachments are uploaded to Google Drive again and linked to the event.
Note: Whole calendars cannot be selected for restore. Select the events you need from the Calendar table instead.
Contacts
When you restore a contact, a copy is created in the user's contact list, including the profile photo.
Note: Contact groups (labels) and "Other contacts" are backed up but cannot be restored.