So, it's not obvious, but I think what you're likely missing is that there are hidden files in the file explorer that can be revealed by clicking the 'show hidden files' button. I didn't realise it would work properly either.
If that doesn't work, you just need to search through the emails with the right keywords. I won't post them here due to spoilers, but everything you need is provided in the section.
Oh, and the security cameras, but I figure those are the obvious ones.