Apps in internal memory or sd card? topic

Hi!


I see that some of the apps are in sd card (application manager -> sd card). But I didn't move thwm there.


1. How Android decides what apps where should be installed?


2. Are there any downsides installing apps to sd card? Except the fact that apps won't be available when sd card is removed.

3. Will progress of my games and settings of my apps will be saved in sd card after apps are reinstalled after factory reset?

Thanks!!