I purchased the Blu-ray disc and copied the disc for my daily viewing. This is because I want to treasure the discs I purchased.If you want to copy a Blu-ray disc, you can refer to this article.#ブルーレイ コピー

If you want to convert Blu-ray movies to MP4 （ブルーレイ MP4 変換） in high quality, you need to use paid software other than Handbrake. I use Leawo Blu-ray Converter, which is compatible with both Windows and Mac.