Siloing. How to show folder for related category but not previous posts

Hello,

Issue:

On each of my posts at the very bottom, I see the category which my posts falls under. For example, a post called "what I think of keto" is part of the diet category and is shown at bottom of the article.

However, there is also link to previous posts that might not have anything to do with category. This is because it is simply the previous article in the chain of articles I published.

Expected Outcome:

I want my site NOT to display previous posts as its un-related to my actual post content. How do I do this?

Thanks,
Lucas