The vivo X9s model does not support SD cards, so software cannot be installed on the SD card.

Additional: For models that support SD cards, you can go to Settings--More Settings--Applications--Preferred Installation Location--to check whether there is an SD card priority. If not, please indicate the phone you are using. Installing software on SD card is not supported.

Operation steps:

1. Find the settings on the mobile phone desktop and enter them

2. Enter the settings and find more settings and enter them

3 , enter more settings, find the application and enter

4. Enter the preferred installation location of the application and select the SD card to try first