Bandwidth on our plans are measured as OUTGOING bandwidth only. That means while working on your site uploading images and media does NOT count towards your usage. Neither does any SFTP and Mail usage as we only monitor outgoing HTTP/HTTPS connections for bandwidth usage.
You wont go offline
We don't take services offline for going over bandwidth usage if on the max plan allowed for that service as long as they are not impacting others. We will not charge users for using more data transfer than the plan allows as long as no other options are available.