Archivist
Collect 10 Nostromo logs in the main campaign (Gold)

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There are 10 Nostromo Logs in total in the game and they are saved automatically when you pick them up. They all have different names like the ID tags so you can easily keep track of them. You may as well wait until mission 16 to collect them all since you will only be able to access most of them after mission 16 during the free roam when you have access to all your tools. If you do happen to miss any they can be gotten via mission select.

Free Roam works via travelling between the transit stations, Lorenz Systech Spire, Sevastopol Scimed Tower, Solomon's Habitation Tower and Engineering. On the map you can see where each exit takes you so you can find the area where the Logs are. The final 2 logs are gotten in mission 17.

PowerPyx has another great video showing you to get each of the logs: