This is limited by the system, and there is no way to install applications on the SD card. Many users think that they are smart enough to get permission and exchange storage, and that they have succeeded. As a result, as soon as the mobile phone was upgraded, all applications were lost, and the mobile phone could not be charged and used normally because it had obtained root permission. Xiaomi mobile phone is different from other mobile phones, because its system is open, and it can constantly upgrade the system for everyone to experience new functions. However, if the application is installed on the SD card, it will affect the upgrade system, so it can only be installed in the memory of the mobile phone. If you need to install it on the SD card, you can only wait for the Red Rice mobile phone development team to develop the native Android system. You can use Android, but you can't upgrade the system to experience new features.