1. To get to the Daily Bandwidth Snapshot" report login to Convio.
  2. Go to your CMS. 
  3. Click on Reports and Tools > All Reports And Tools. 
  4. Find the Usage section.
  5. Click on "Daily Bandwidth Snapshots".
The "Daily Bandwidth Snapshot" report will only update at the end of every month.

You can find additional information about the "Daily Bandwidth Snapshot" report here.