My clamshell iBook running 10.2.4 does not have a CD burner. I do have a SuperDisk drive and plenty of disks, which I would like to use to archive my iPhoto library. But when I try to copy the iPhoto library to disk, I get the message that "one or more items can't be copied." And then a message that the operation could not be completed because of an unexpected error. Is there a workaround?