This page of our guide to Life is Strange True Colors contains a description of Part 5 of Episode 3. Your task is to search the files.
Talking to friends
When you get back to the apartment, you'll see that your friends are feeling at home. They came with a laptop on which they found a conversation from the unfortunate night.
Listen to the recording to move the story forward. You can look around first to examine everything they came with.
If you took away Charlotte's rage, Alex will burst. It will cause Steph to leave, and Ryan will go after her. If you have left Charlotte be, your friends will stay with you.
You have to run through the files. It's an easy task. First, listen to the conversation with the date 4/28 8: 41p.
Then go to the mail and open the second message sent on4/28.
The task that ends this episode is to look at the files and select "RheaSchematic". Alex will connect all the dots. The chapter will end, and you will advance to the 4th episode of the game.