Possible Duplicate:
Make a USB drive read only.
Is it possible to format a USB memory stick so that it cannot be formatted again?
What I actually need is to write software (using C# preferably) and then run that software on a specific PC when a USB memory stick is inserted to the USB port, and allow users copy files into the USB drive then somehow lock that USB drive so that it cannot be formatted or changed anymore!
I am not sure it is possible but I wonder if somebody has got any idea that it is achievable.
Thanks very much!