I don't know if this initiative includes Wikimedia Commons but I'm sure they've got substantially more data than that, and higher typical bandwidth usage.
https://commons.wikimedia.org/wiki/Special:MediaStatistics
This MediaWiki special page is also available for other wikis; the English Wikipedia itself hosts 152 GB of files that were uploaded there instead of to Commons for one reason or another (e.g. non-free material under fair use).