Putting songs, video, pictures on psp problem?

May be...

I know how to do it and everything the thing is sometimes it works but most of the time it doesn't like just now i could put a song in and it worked and then i tried another song and it didn't work and yeah they are all in mp3 format



My guess is there is probably wrong with the USB cable



Any ideas?

might be memory card, if you can format it