I'm am currently travelling so always using a different pc, I have just purchased the Sony NW-E507. I put roughly 50 tracks on it with no problems but I have just come to another pc to put a few more tracks on it and sonic stage is saying it must delete everything and initilize the player!! Obviously this is not what I want so I thought fine I'll back up the files and load them again after I put the new tracks on to see if that would work, obviously it didn't. So now I have two folders NWWM and OMGAUDIO with all my 50 tracks on the desktop, and the player with a new file system and the 6 new tracks, is there a way to get my 50 tracks back on? Is there a different way of doing this everytime, different software or something? Sony must have known people may be using different PC's and want to add tracks on the move from interent cafes like my self. Normally I would sit down for a few hours trawling the web for anwsers but thats a bit difficult in a sweaty room with slow computers! Thanks for any help you may be able to give. Cheers Stewart