Windows 10 has "packet writing software" that allows you to drag/drop, add files, rename files, and delete files from re-writable discs, just like you can do on a thumbdrive, but I don't think they have it for blu-ray discs. Win10 will do blu-ray discs, but not well.
Does IMGBurn allow you to do that on blu-ray discs? I don't see any way to do it.