On Medium? I haven’t found one, Obinna. Once something is posted, “hiding” it just means that Medium won’t distribute the link through the normal channels… but the link still works, so anyone who had the link already through their Daily Digest or whatever can still get to it. What I’ve done is copy the post contents, save it as a <insert favorite word processor here> document, then delete the post. If I think I’ll want the content sooner rather than later I’ll copy it back into Medium and save it as a draft.
Now that’s not to say that Medium hasn’t added or improved their features, so if you hear something different, check that out.