Requred field, can be set to local hard drive, network drive. If it is inside OneDrive or GoogleOne then files will be automatic backup to cloud.
Email Service is required, it sends email for user activation, password recovery, also it receives email to extra attachments save them to your storage.
Optional, At the End Of Day, a report of activities will be sent to the recipients.
User maintenance, add, edit, delete users, assign permissions.