FWIW, I upload a few things to GDrive and ODrive. Never had issues, and neither one I've seen anything that says they will delete data if it's adult content.
https://www.google.com/drive/terms-of-service/
https://www.microsoft.com/en-us/servicesagreement
The closest I see is from MS regarding sharing of content:
- iv. Don’t publicly display or use the Services to share inappropriate content or material (involving, for example, nudity, bestiality, pornography, offensive language, graphic violence, or criminal activity).
Since I don't share this kind of data, and I only use them to backup what I have, should be fine.