My first Blu Ray Burner had to be sent back when it had trouble reading DVD disks including the disk it came with. Its replacement has worked fine. Blu Ray is still bedding in some ways. 50 GB data burns are far from mainstream at the moment so essentially in this area you are covering new ground. You will need software that supports 50 GB burns and there may be stability issues there. If software checked out them I would send the drive back and have it replaced. Also the drive should have come with its own burning software. Hopefully it is not Nero. I have never liked Nero which on my past experience is invasive.