Hi guys! I was trying to downgrade/repair my macbook because it was running really slowly and I think I accidently erased the wrong thing in disk utility because now when I try to turn on my Mac, flashing folder with a question mark appears and when I enter recovery mode and go to disk utility there is a HDD drive but it is red and when I click on it it says 'this drive has a hardware problem that can't be repaired.' I know that it says that I can't repair it but maybe you know any solutions how to fix this problem? Sorry for my bad English. Thanks!