I've got several burned dvd's containing rare stuff that I'm trying to back up to my hard drive. One or two were easy, as they are single files, but several have 2 files, audio_TS and video_TS. Do I have to convert them to an avi before I can back them up in on my hard drive. Is there a free converter online I can use, or should I buy one? How do I save these once they've been converted? Many thanks.