Are you exporting from a dashboard? When we’ve done this in the past we’ve faced issues with all the data coming out. If from a dashboard one option could be to not include these fields in your underlying dashboard data (remove or create a new one with only the data you need). 

Best approach with getting data out though is to use workflows to create exports, these can be transformed into any format you need. 

​@QS17 

If you’re using Workflows → Data Export Task, you can select only the fields you want before exporting — just uncheck any fields like Email, First Name, etc. It doesn’t require modifying the dashboard dataset.

Alternatively, if you’re exporting via the API, you can post-process the JSON or CSV and drop PII fields before saving or sharing. Let me know your exact method and I can suggest more tailored steps.