my software crashed

[Guest 3amer]

hi there i give my huawei y511_u30 to friend he is pro at this so he rooted it put cwm recovery and make backup but the internal storage so low so he put it on sd card 2 days ago my mobile restarted never opened again it keep loading i talked to him he told me how to open recovery mode then i tried to restore but recovery dont read sd card so i put the backup file on pc and tried to use adb as he said but it keep give me error host unknown i tried a lot of ways i tried to kill daemon and adb but nothing changed and my friend is traveling now and i need my mobile so much someone can help me please