Using getRecentExternalVolumeNames()

// Detects if user granted permissions to USB drive root, rather than accidentally granting it to some other folder.
private fun driveHasRootPermission(uri: Uri): Boolean {
    val documentFileFromUri = DocumentFile.fromTreeUri(appContext, uri)
    val nameFromUri = documentFileFromUri?.name ?: ""

    if (Build.VERSION.SDK_INT >= ANDROID_11_SDK_30) {
        val recentExternalVolumeNames = getRecentExternalVolumeNames(appContext).map { it.lowercase() }
        
        // Checks whether the user-selected Uri points to a writable location and its name matches that of a recently used external volume. 
        if (documentFileFromUri?.canWrite() == true && recentExternalVolumeNames.contains(nameFromUri.lowercase())) return true
    }
}