Once the data is in Quickbase, you can get the data in many ways. There's no extra step to make it a CSV. You can just add this parameter to any report, and it will become a CSV link:
https://{myrealm}.quickbase.com/db/{databaseID}?a=q&qid=11&dlta=xs
So you could make a report and filter it to the approved records, then get it with a URL like this. You can also save a report as CSV in the report settings.
If you need to put the CSV somewhere on a filesystem, it depends on your workflow. You could have some simple script to get the CSV on a recurring basis (like a cron job if you're using Linux or Task Scheduler on Windows) through QB API. Then similarly you can send it somewhere that way. The exact process depends on where you need to put/send it to.
