Access files written by other applications on Android?

[UhSomeUsername]

Hi, I'm building a Tauri v2 Android app that can read and write files in /storage/emulated/0/Documents/. My app can access the files it creates, but I can't read files that are created by other apps, like Nextcloud, in the same folder.

I've set the following permissions in mobile.json, but I also tried setting the actual path I am trying to use:

{
  "$schema": "../gen/schemas/mobile-schema.json",
  "identifier": "run-app-mobile",
  "description": "Permissions to run the app (mobile only)",
  "windows": ["main"],
  "platforms": ["android"],
  "permissions": [
    "fs:read-all",
    "fs:read-dirs",
    "fs:read-files",
    "fs:read-meta",
    "fs:write-all",
    "fs:write-files",
    {
      "identifier": "fs:scope",
      "allow": [{ "path": "**" }]
    }
  ]
}

I feel like I have tried everything, but perhaps I am doing something wrong that is obvious to someone with more Tauri experience? Is it even possible to access files created by other applications? I appreciate any help that I can get.

Thanks!