~= 15 GiB 921 MiB 614 KiB 409 B 4 bit 4/5 bit
1 DVD-18 = 15.9 GiB
1 GiB = 0.062893081761006 DVD-18
https://www.unitjuggler.com/memory-umwandeln-von-DVD-18-nach-GiB.html