Useful, but it contains factual errors:
>S3 File storage. Not directly used for mounting, but you can directly download files from HTTP.
You most certainly can mount S3 buckets, and its done frequently in data pipelines throughout the industry[0].
>S3 Glacier Low cost storage system for backups and archives and such
Sure but it would be good to include why there is a tradeoff in price, why is it low cost? For Glacier its intention is to provide storage, but rarely fetch data, as it is very slow.