E:failed to mount Galaxy J5 J510M

[mashik]

E:failed to mount /data (Invalid argument)
can’t mount ‘/data’ (Invalid argument)
E:failed to mount /data (Invalid argument)
E:Can’t mount /data/log/recovery_log.txt

 

When i try to reset my phone, above error come to me, what to do now?

[Romain77]

your phone may be damaged now, So, I think that You have to install Stock Rom again.  your phone will not avoid warranty. Stock Rom is default and official Rom. – Stock Rom.