Не работает запись видео на sd card android?

File mediaStorageDir = new File(Environment.getExternalStorageDirectory(), "AppDir");

File sdCard = Environment.getExternalStorageDirectory();
File mediaStorageDir = new File(sdCard.getAbsolutePath() + "/AppDir");

mediaFile = new File(mediaStorageDir.getPath() + File.separator + "VID_"+ timeStamp + ".mp4");

@AfterPermissionGranted(RC_CAMERA_AND_LOCATION)
    private void methodRequiresTwoPermission() {
        String[] perms = {
                Manifest.permission.CAMERA,
                Manifest.permission.WRITE_EXTERNAL_STORAGE;
        if (EasyPermissions.hasPermissions(getContext(), perms)) {
            Log.d("PERMISSIONS", "All right");
            initService();
        } else {
            EasyPermissions.requestPermissions(this, "Need perms", RC_CAMERA_AND_LOCATION, perms);
        }
    }