How will I know the contents of a specific https://s3-ap-southeast-1.amazonaws.com bucket, e.g. https://s3-ap-southeast-1.amazonaws.com/cutepuppies?

[imlearning]

How will I know the contents of a specific https://s3-ap-southeast-1.amazonaws.com bucket, e.g. https://s3-ap-southeast-1.amazonaws.com/cutepuppies? I don't have any access with the site but I'd like to know if I will be able to get some freebies from it, what should I do? How will I be able to see those files which I can freely download for any https://s3-ap-southeast-1.amazonaws.com bucket ? (attach is the image)

I should've known about hak5.org earlier. Thank you guys!

[digininja]

Please don't ask how to gain access to things you shouldn't have access to, that goes against the forum rules.