Relatively new, are additional expiration options: 1 to 100 downloads, 1 is the default; or 5 minutes to 7 days, 1 day is the default. And an option to protect

Relatively new, are additional expiration options: 1 to 100 downloads, 1 is the default; or 5 minutes to 7 days, 1 day is the default. And an option to protect with a password. Upon expiration, entering the URL behaves the same as if you enter a bogus URL, it's basically denied to have ever existed, i.e. it doesn't say this URL has expired.