Where is outside storage?

Hi, everyone here.
It's saved when you save the picture
Where can I check the outside storage?

And is this error correct that you don't have access to internal storage?

You try to set background color to an image, maybe you wanted to set background image to ...?

I succeeded in taking screenshots using the Typhoon screenshot module. However, I thought that the screenshot photos that were taken were stored in a dedicated external repository, not in my phone gallery. Therefore, I want to know where the outside storage is and make sure that the photographs taken are well saved..

The images are stored in ASD
See also Some basics on Android storage system