How do I save emails on my brand new I Pad Air?

Save to what exactly? If you don't delete your mail, it's in your mailbox forever. I'm assuming you're using IMAP mail configuration.

Letters do self delete after about a week. If you haven't deleted the message yourself it will be in your email account on the Safari browser.

Getnoff wrote:

I meant saving email to other folders. I know they stay in the 'inbox' until I 'delete' them, but what if I want to create 'folders' to save them in How do I do that?

No...I am not using an IMAP mail configuration!

Have a look at this article.