S3 is not a block device, therefore you do not have a filesystem there. It is an object storage and the reason that you see files and folders through the AWS web console is because the console represents it that way.
To achieve what you describe, you might want to look at s3fs (FUSE based). It creates a pseudo-drive for you to work with. Mind you, the overhead is substantial and as such the performance is not even close to a network shared folder.