I play my MP3s in the car off a USB drive and stream them to my ps3. When I went to install windows 7 build 7100 I deleted everything off the USB drive and tried to install w7 off that. After getting w7 set up I reformatted the USB drive and put my music back on it. Now a bunch of files that previously played refuse to work. In the same light a lot of files I could previously stream to my ps3 using ps3mediaserver now give me a 'format read' error. What could have happened to my files?