Originally Posted by attila123456
After reset the phone was started with a different (new) google account, so it's not a sync thing.
Based on replies in this thread, factory reset doesn't wipe personal data from the internal storage.
Just a correction. You are using stock recovery or custom? If it's the latter, then that's it. Custom recovery like cwm/twrp won't wipe your sdcard (a.k.a your internal sd card). But if you are using stock recovery, factory reset will wipe all of it including your sdcard partition. So if you are using stock recovery and still the data is there..well that's weird.