Hi, I am a new android user. I don't know if this question is related to MIUI rom specifically or general android questions. 1)When I install an apk, where is it installed to? 2)If I want to uninstall an application, what is removed? Only the application? What about setting/save data? 3)From file explorer, I can see many folders. May I know which folder can be deleted safely? 4)In my reboot recovery, I can see many settings to wipe. (I'm using CWM). Can you please explain what each of them will do? a)wipe data/ factory reset (I have tested this just now, this seems to remove all my user setting, uninstall my applications, but the data remains, songs, pictures, etc) b)wipe cache partition c)wipe dalvik cache Thank you for answering.