Default [Q] YP-G70 Intl - pattern locked

I got a YP-G70 International which is pattern locked cause my friend forgot it

Her Gmail pass is correct but can't unlocked either. I can login at email, Google Play and device management, but no luck yet

I can't hard reset yet cause I must backup her files first, what I should do: root the device or flash a ROM via SD?

Thanks in advance!