When ever I uninstall Minecraft and reinstall it my world for external storage disappear

When ever I uninstall Minecraft and reinstall it my world for
external storage disappear

Expected result
When ever I uninstall Minecraft and reinstall it my world for
external storage do not disappear

Actual result
When ever I uninstall Minecraft and reinstall it my world for
external storage disappear

How to reproduce
1.When ever I uninstall Minecraft and reinstall it my world for
external storage should not disappears

When ever you fix it please give players there world