OK! Next time, I hope you can check your data backup carefully before you do any chance to it.
But, now, you should act carefully to restore all your wanted photos back:
- Do not save anything new on this camera any longer in case that anything new on it would rewrite your deleted photos.
- Insert this camera to your computer.
- Download a camera memory card data recovery freeware to your computer and restore all your deleted photos back successfully as soon as possible:
- Save and back up restored photos on another memory card or hard drive in case of data recovery failure.
Thank you for your nice help. I have read your answer and known my problem can be fixed by a data recovery program. After reading some related files and threads, I also prove it is absolutely right. So, I directly tried your data recovery freeware. It works really well. Now, I have retrieved all my wanted photos back successfully.
Thanks a lot!!!