ya some MP3 files i donwload and im listening to work for like 1 minute and make this HORRIBLE annoying noise and get corrupted, how do i fix this?

also i was wondering that when im placing the MP3 songs on my psp it keep getting this error about it not finding the right file and wondering if this is my memory card or limewire.

everyone told me its my memory card but i got another one with same problem