I've update several times and each time I've used the Ethernet port. The only time I've ever used a disc, is when I wanted to go back to a previous version one time, and I burned disc that contained an earlier version obtained from one the the posts in this thread and again no problems. There have been several individual who reported bricking their players, but as long as you let the upgrade proceed at its own pace and allow it to finish to completion ( the unit will actually shut off when done ) I believe the ethernet route to be just as good as using a disc. IMO it's a lot easier. BTW my player is the Costco version of the Toshiba HD-A3, the HD-D3... no difference otherwise.