To truly exclude storage, you would probably want to:
- Manually empty the trash after you export your content.
- Deleting the content isn’t enough as there would be a version history on the draft.
- Disable Drafts’ backup feature.
- Turn off iCloud sync as that would be sharing it to other devices that might have local backups, etc.
If you don’t mind me asking, what scenario requires you to remove content from your local device after transferring to something like Notion? Given that Notion is also likely to be accessible from the same device after the same level of access is attained, I’m just wondering what driver is in case the underlying issue is actually something quite different or that the apps you are referencing are not suited to - e.g. storing all of your passwords in plain text.