Comment by vel0city

So imagine I decide to make some tool to let my customers store their files. I just decide to toss them all in a big fat S3 bucket behind the scenes with what look like random UUIDs for the keys in the bucket. All the relationships between whose files are whose are in some other database not hosted on AWS.

How does AWS then determine which files are whose when my angry clients go knocking on their doors because I've decided to disappear?