Default [Q] IOroot 25 problem

Hello,

I have LG g2 D802. Accidentally upgraded to Official Kitkat 4.4.2. As I am a root user I was in search of a rooting process and I found this IOroot 25 method. It installed the super user, but incompletely. But it installed a recovery which is horrible. It does not recognise the sd card and when I did factory reset it completely wiped the sd card. Then I tried to unroot or reinstall the official KDZ file, all not successful. The computer asks for formatting Disk G, H , i etc. Do I format it ? What I should do. Kindly help me

Thanking You