You will lose ALL user data (apps, photos, messages). This is a factory reset via firmware, not a bypass.
The Sony G3312 is a resilient device, but its security locks are tough. Flashing an FTF file is the nuclear, guaranteed option when you cannot remember your screen lock or Google account. Sony G3312 Lock Remove Ftf File
A standard lock-remove FTF (targeting only userdata security files) might keep media, but it is risky. Always assume data loss. You will lose ALL user data (apps, photos, messages)
Before proceeding, consider this: