~= 15 GiB 921 MiB 614 KiB 409 B 4 bit 4/5 bit
1 DVD-18 = 1.446096575819E-11 ZiB
1 ZiB = 69151674702.893 DVD-18
https://www.unitjuggler.com/memory-umwandeln-von-DVD-18-nach-ZiB.html