I am facing the same problem with my s8+ and it is not connecting with hard drives and usbs. And the phone sometimes does fast charging otherwise it is on cable charging and my charger works fine with other s8+. Do I also need to replace the daughterboard? My phone is still in warranty tho kindly guide me so I can take suitable action. Thanks. And kindly tell me if the problem is with the daughterboard what made it broken or it is due to water?