even user given permission to access for photo or media files cannot able to create folder in android code example

Example: How to create a video file path on Android 10

private fun saveMediaFile2(filePath: String?, isVideo: Boolean, fileName: String) {
filePath?.let {
    val context = MyApp.applicationContext
    val values = ContentValues().apply {
        val folderName = if (isVideo) {
            Environment.DIRECTORY_MOVIES
        } else {
            Environment.DIRECTORY_PICTURES
        }
        put(MediaStore.Images.Media.DISPLAY_NAME, fileName)
        put(MediaStore.Images.Media.MIME_TYPE, MimeUtils.guessMimeTypeFromExtension(getExtension(fileName)))
        put(MediaStore.Images.Media.RELATIVE_PATH, folderName + "/${context.getString(R.string.app_name)}/")
        put(MediaStore.Images.Media.IS_PENDING, 1)
    }

    val collection = if (isVideo) {
        MediaStore.Video.Media.getContentUri(MediaStore.VOLUME_EXTERNAL_PRIMARY)
    } else {
        MediaStore.Images.Media.getContentUri(MediaStore.VOLUME_EXTERNAL_PRIMARY)
    }
    val fileUri = context.contentResolver.insert(collection, values)

    fileUri?.let {
        if (isVideo) {
            context.contentResolver.openFileDescriptor(fileUri, "w").use { descriptor ->
                descriptor?.let {
                    FileOutputStream(descriptor.fileDescriptor).use { out ->
                        val videoFile = File(filePath)
                        FileInputStream(videoFile).use { inputStream ->
                            val buf = ByteArray(8192)
                            while (true) {
                                val sz = inputStream.read(buf)
                                if (sz <= 0) break
                                out.write(buf, 0, sz)
                            }
                        }
                    }
                }
            }
        } else {
            context.contentResolver.openOutputStream(fileUri).use { out ->
                val bmOptions = BitmapFactory.Options()
                val bmp = BitmapFactory.decodeFile(filePath, bmOptions)
                bmp.compress(Bitmap.CompressFormat.JPEG, 90, out)
                bmp.recycle()
            }
        }
        values.clear()
        values.put(if (isVideo) MediaStore.Video.Media.IS_PENDING else MediaStore.Images.Media.IS_PENDING, 0)
        context.contentResolver.update(fileUri, values, null, null)
    }
}
}