Individual files can be protected: you can restrict view, download and editing per user. By default: "No restrictions set. All users have full access."
Set permissions
Open the File Permissions for a file. Add users or groups and limit the rights per entry – for example Restrict download. If download is blocked, affected users see the note "Download is restricted for this file." An entry with no boxes ticked means full access.
Request access
If a user does not have sufficient access, they can use Request Access ("Request extended access to the file") to send a request with a short reason. Confirmation: "Access request sent successfully."
Approve requests
Authorised users see open requests under Access Requests and can Approve ("Access request approved. Permission granted.") or Reject ("Access request rejected.") them. Your own requests are under My access requests.