Storage space & Google Drive integration

When a base is integrated with google drive, are the data/attachments stored by Airtable, or are they stored by google?

I’m making a base that needs to have a good deal of photo and video, and I worry about hitting storage limits (not enough to warrant getting an enterprise plan, currently on pro).

If the files are stored on Airtable, does anyone know of an elegant way to do something similar (store base contents externally, but access via airtable)?

The Drive sync feature just pulls metadata (data about your data) from whatever Google Drive folder you designate. None of the actual data is stored by Airtable.