> It does.
No it doesn't, `ACTION_OPEN_DOCUMENT_TREE` provides you with a `DocumentFile`, which isn't a `java.io.File`.
From their docs:
> It offers a simplified view of a tree of documents, but it has substantial overhead
https://developer.android.com/reference/androidx/documentfil...
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Your fork uses `MANAGE_EXTERNAL_STORAGE` which Google Play heavily restricts:
https://github.com/Catfriend1/syncthing-android/blob/main/ap...
This is very likely the reason that your fork no longer wishes to be on the Play Store:
> Planning to close my Google Play Developer Account. Please say hi if you are interested in obtaining the latest gplay release files from me to help in publishing this app.
https://github.com/Catfriend1/syncthing-android?tab=readme-o...
EDIT: The dangerous permission for `MANAGE_EXTERNAL_STORAGE` doesn't appear in the "App Info", which may be what you're seeing.