Copying MP3s to a Sandisk microSD for use...

Hi there,

Yesterday I copied around 160 MP3 files from my PC to the microSD via an multi card writer. After copying, I inserted the microSD to the cell phone to play them and found out that some files could not be played. I then reformated the microSD with the cell phone and copied the MP3s again. This time I found that some files which I could not play before could now be recognised and played and other files which were good in my first try could not be played again. My MP3 files are all good none is corrupt.

Has anyone out there come across this situation? An workaround?

Thanks in advance for any help.