The first Blu-Ray disc was created in 2002. 16 years after, blu-rays have invaded video game consoles but have still not boomed in the consumer market as much as CDs and DVDs. Why is that? There was a time when everybody archived their data on their trusty DVD-Rs, why won't people do the same with BDs? The primarly used archival supports used today are HDDs and LTO for corporations, the later still being today the cheapest euros/Go ratio: A single LTO7 cartridge can hold up to 6TB of data or 15TB compressed data for a price of 64 euros on amazon, we are looking here at a 0.010euros/Go ratio. Even though LTO is incredibly cheap and reliable, LTO drives cost more than 2000 euros. If money isnt an issue for you, you should consider LTO. You may ask me: "What about HDDs?". Well HDDs do indeed have a better euro/Go ratio than Blu-Rays (0.029 euros/Go for a 2TB Toshiba HDD) but they tend to not be the best solution for prolonged data archival as the plates need to spin once in a while to avoid bad sectors piling up. Finally, discs are a very convenient way to store your data since you can store them in jewel cases labeled by their content, sorted in bookshelves or a shoebox.
Be sure to have an M-Disc compatible Drive to burn these