I finally bought a Blu-ray burner/player for my PC. When I looked around the net for test reviews, I discovered that not all Blu-ray drives can play 4K or record on 100GB discs. This discovery helped me in deciding which drive to purchase...I chose the Pioneer BDR-S12UHT. This burner/player is a perfect fit for my ultra wide monitor and my back up needs. It cost double the price (120 Euros) of a standard drive, but it plays Blu-rays in 4K and it can write up to 128GB on one BDXL disc.