But even Snowden accessed the data via an API. He didn't (at least I don't think) he walk into a server and start pulling drives. He went through various tools

But even Snowden accessed the data via an API. He didn't (at least I don't think) he walk into a server and start pulling drives. He went through various tools to get to the data. At that point full disk encryption was pretty useless. The drive would be mounted and opened.