Returning to the game

So the following came out, and I upgraded the game to the latest patch. I had a few questions while trying to look up some changes that occur with the nightmare difficulty. One Hong led to another and I found myself on the dying light home page for dockets. I remember receiving some dockets for pre-ordering the original game when it first came out. However, I guess I gave up since I didn't know what to do with them.

Were dockets ever a thing? I couldn't figure out how to use them before, so I guess I just left them to rot. It says I have 8, and that it is linked to my ps4. However, I don't know what to do from there. It is not a big deal since I like to start from scratch with little help in the beginning, but I wanted to see if there was anyway to finally utilize them!

Thank you all.