Hi , friends
I have 4GB pen drive of SONY. I am not able to format it & delete the files present in it.
And also I am not able to use its free space.There is not any switch for write protected on it.
:mad: :mad: Please give me some answer which help me to solve this problem.

First its not a good idea to piggyback your question on someone else's. This can lead to confusion. You should start a new thread. So I've moved your question to its own thread.

What happens when you try? What are you doing to format?