This is a set of 40 SONY BD-RE Blu-ray Discs (25GB) for repeated recording. All discs are genuine SONY products. They were formatted using a SHARP BD recorder after being recorded on once. I formatted them after playing back the recorded programs on the recorder, so I believe there should be no issues with reading them. While there is no writing on the discs themselves, the clear cases have scratches and scuffs. Please understand this before purchasing. #SONY #BD-RE #BluRayDisc #Genuine