Latest questions about "snaps"

If you take a picture on Snapchat and discard it without sending it, putting it on your story, or saving it to memories, can it come up again and does Snapchat store it?

I accidentally sent the wrong Snapchat to someone, if I delete my Snapchat account before they open the snap I sent will they still be able to open it after I delete my account?

Can I send snaps to someone who hasn't accepted my friend request?

Can I recover old snaps between me and a Snapchat friend via email?

Okay so I sent myself a snap like an year ago. Like I didn't send it to anyone. Would it be saved on your servers? Or will it get deleted? Is there anyway of anyone seeing it?

If I send my friend a snap, and then block them, then add them back, will they see the snap?

When viewing a friend's Best friends list on their profile, will I see their username or actual name if I am also friends with them?