How can I save image/video thumbnails to external storage on my android device?

Although the image directory of my galaxy s3 device was set to storage/exSdCard/DCIM/.thumbnails it seems that image and video thumbnails are saved to storage/sdcard0/DCIM/.thumbnails by default.

The images and videos are saved to proper location but their thumbnails are always saved to the system generated default location of internal storage card.

The problem wasn't solved even after I moved the camera from system->app to data->app and DCIM folder from internal storage sdcard0 to external storage exSdCard.

Any idea or resolution?

Thanks,