A website where users can create "boxes" (storage spaces) that can store up to a number of files of given types (these variables are to be defined by the box creator via check boxes; multiple types of files might be allowed for a box if the creator wants so) and works as a safe. When the box reaches its file limit it "opens". (And the box's contents turn visible to everyone who posted something on it – until that point, all of its contents remain hidden even from the box creator.)
This website should contain:
1- A main section where people can create boxes freely without signing up and make the box public or private (a private box needs a link and, if chosen, a passcode for other users to post on it). These section should contain a link to the terms and conditions as well;
2 - A field that allows users to look for open boxes via keywords, filetypes, etc;
3 - A sign up link which leads to a sign up form and a small login section which leads to a page similar to the first one with some more resources - like browsing trough boxes that the user previously created/participated in.