Jason Chafetz noted, on FoxNews, that in addition to having the "Trump meeting" memos at home, Comey also had notes that correlated codenames with real names. The same sort of offense that Hillary committed with her homebrew server.
I don't know if this offense is included in the "decline to prosecute" conclusion, but it is great to see the FBI and DOJ get hammered again for favoritism and dishonesty. One day the public may wake up that these institutions are full of rotten people.