The Blu-Ray discs are highly recommended. Was fired with an LG BH10 LS 38. After updating the firmware of the Blu-Ray burner, the blanks were detected with write speed 10 x and recorded with 10 times the normal speed. Every single blank was tested after firing with different BD drives on Kompatibillität and all blanks were detected without problems and could be read completely without mistakes. To back up a PC system with the previously mentioned burner and these blanks is this combination a great solution. In addition to an additional external hard drive to back the Blu-Rays have the advantage that they can not be tampered with again after firing. For me, a strong buy recommendation.