A bucket is a container for objects stored in Amazon S3.
"99.999999999% durability and 99.99% availability of objects"
Older versions of an object can be retrieved by specifying a version in the request. (Storage rates apply for every version stored.)
Once you've setup your Amazon AWS account you can access the Amazon S3 tab...
Create a bucket (unique to ALL amazon users)...
Now you can create folders and upload objects with the web interface.
Either during the Upload process or later with Right click you can set it as Public.
After making the Object public you can right click on it to see properties: