How do you put music on a psp?

How do i unlock the songs that i put on my music folder for my psp?

• all of the songs that i put in a folder to put on my psp are locked and i cant put them on my psp how do i unlock them only respond if you know

• Answer:

  if you mean that they are read only files just right click on them in your explorer then choose properties and there is a tick where it says read only, take the tick out, then save it and it's unlocked.