I want to archive my BR (not all but some) in case of fire at home or else, for me it's like a backup. The BR disk 25G is cheaper than 50G and it all be OK for me. It is ridiculous but it’s a faq to me. The policies who assure my home don't replace at the same price and I do pay for the difference. The 50G, in Canada, is not cheaper and come from japan+shiping. I downloaded a trial of Pavtube

multipelife.com/backup-burn-50gb-blu-ray-to-25-gb-disc.html