Restore a user’s Google Drive files
Admins can now restore a given user’s deleted Google Drive files for a specified date range. This helps ensure that, if a user accidentally deletes important files, those files are not permanently lost. The feature pertains to files that have been emptied from the Trash only. Files still in the Trash can be easily recovered by the user.
More information:
https://support.google.com/a/answer/6052340