Students that graduate from UNI are eligible to use a tool called Google Takeout to easily make a back up of or migrate their account data to a different Gmail account while their current UNI account is still active. You can find instructions on how to use Google Takeout in Google's support documentation. If you run into an error message transferring content, you may need to use a private web browser session.
Employees, both current and former, are not allowed to use Google Takeout for migrating or downloading personal data from their UNI Google account. Such individuals will need to forward any personal email messages to their personal email account and download any personal Google Drive content using the Drive interface.