hi every time i try to back up stuff on a DVD-R 4.7gb with Nero, My disk only reads a 4.48G. I have tried several brands but same thing happens. My Nero is updated recently and I uses IO magic dvd burner(crap). Does anyone know whats wrong? thanks
Your Nero is reading the disc correctly. Manufacturers quote the capacity of a writable DVD disc in decimal (base 10) rather than binary (base 2) notation so a 4.7 GB disc stores 4.7 billion bytes [4:700,000,000 bytes ÷ 1000 = 4,700,000 KB ÷ 1000 = 4,700 MB ÷ 1000 = 4.7 GB] . Expressed in binary notation (as is typical with CD-R, CD-RW DVD, DVD-RW and most operating systems) the same disc has a capacity of roughly 4.38 GB [4:700,000,000 bytes ÷ 1024 = 4,589,844 KB ÷ 1024 = 4,482.27 MB ÷ 1024 = 4.38 GB] .
