- Oct 6, 2016
- 9,803
- 322
I did. Now read the post I linked. It's not optional. If you still insist on wiping data for the Gallery app only, go to TWRP's File Manager and delete the folder /data/data/com.miui.gallery (it's the app data folder, the app itself is not removed).Read the post that I quoted.
By downgrading, you're more than likely to have other apps or background services crashing without even knowing it.