In general, file explorer apps are one of the rare apps that are allowed to opt out of scoped storage, so it doesn't really make much sense for them. Supporiti

In general, file explorer apps are one of the rare apps that are allowed to opt out of scoped storage, so it doesn't really make much sense for them. Supporiting all file operations via SAF while keeping compatibility back to Android 1.0 with old APIs would also be quite a hellish operation.