Try using IDM or Jdownloader, IDM worked well for me.

You can get a 50 pack of Verbatim’s standard BD-R for ~$40 AUD, or their premium Datalifeplus discs for ~$100 AUD. I’ve used both of these discs, and I’ve run burn quality tests and they’re both great. This is just talking about single layer discs, so 25GB per disc. 50GB discs are reasonably priced, 100GB and 128GB start getting a bit rich.

Yep! Quote from digitalfaq

The BD-R write-once type is based on a completely new concept for the recording layer utilizing a two-layer structure composed of silicon (Si) and copper alloy (Cu) inorganic materials. When heated by the recording laser beam, these melt and the Si and Cu alloy become a composite forming recording marks. Because the material is inorganic, it is not affected by light, thus realizing a disc with outstandingly high reliability in terms of archivability.

And another quote from the same source

Write-once recordable DVD-R/DVD+R media (as well as CD-R media) all uses synthetic organic based dyes – usually azoic dyes (metallized azo chelates or azo metal chelate). Some of them are based on other synthetic organics, such as cyanine, dipyrrometheme or oxonol.