I have an external USB blu-ray player/burner that I'm having trouble burning blu-ray discs with. I've never burned a BD-R before. The drive can read blu-rays fine, and can burn DVDs fine. It recognizes the blank BD-R discs that I insert, but when I attempt to burn them in Finder, it gives me an error message: ("The disc can't be burned because communication between the computer and the disc drive failed (error code 0x80020022)"). I've tried on two Macs, one running Sierra, the other El Capitan. I've tried with Burn app too. I've reset the PRAM, I've tried different USB ports. I've tried at the lowest burn speed available. It always ejects the disc during the "preparing" stage. I'm using good quality Verbatim 100GB discs. My burner says that it supports quad-layer discs. Any suggestions would be helpful, is this the burner, a problem with Mac OS (X), or the discs?