You can find an explanation of the Android permissions on the Obsidian Help site: https://help.obsidian.md/Obsidian/Android+app#Storage+permis...

Obsidian can't use scoped storage because:

> 1. Scoped storage doesn't provide a way to watch for external changes, which is critical when using Obsidian with a third-party syncing tool.

> 2. Scoped storage performs many extra permission checks for every single file access, causing significant performance degradation when opening and using Obsidian.