Comey's Firing Info from FBI Vault

Two things stood out to me (pics below)

1)Going Dark

2)Secret Computer

https: //vault.fbi.gov/records-related-to-the-dismissal-of-fbi-director-comey/Records%20Related%20to%20the%20Dismissal%20of%20FBI%20Director%20Comey%20Part%2002%20of%2002/view