No, I didn't tried to format it because at first i didn't know that I could. =P
Do have to install the firmware again after doing it?

To transfer I plug the cable in the player, windows recognize it as a driver, I open the driver directory and copy the files onto the directory. Is there another way to do it?

The files are corrupted even if I don't play them with winamp. Just transfering and trying to play on the player doesn't work, the player won't read it and turns off.

But some files do work on it. I have 20 files on it that play perfectly. What do you think I should do?

Thanks,

Bruno.

Sorry for the bad english again. =P