How to transfer Feeds or posts to another account/website?

Feeds belong to one website (project) where they have been created initially. You can not transfer feeds from one of your websites to another website within one account, as well as transfer posts from one website to a website in another account. You can transfer feeds just together with the website to another account. Read more about transferring the project to another account in this guide. 

If you need to transfer posts from one website to another website within one account, create Feeds again in the new project and copy the post content to the new post in another project manually.