How to delete all my staff in my icloud

Hello Mr.royf,

After reviewing your post, it sounds like you want to manage the content on iCloud. I would recommend that you read this article, it may be able to help the issue.

Manage your iCloud storage - Apple Support

You can reduce your iCloud storage by choosing which apps and backups to store, and you can move or delete documents, photos, and email messages that you no longer need.

Thanks for using Apple Support Communities.

Have a nice day,

Mario