Recently I saved a dual layer DVD I purchased from my local CD shop to my hard drive so I could make a 100% exact copy of it without any quality loss.
I saved it to my hard drive using “DVDFab5”.
Then burned it off my hard drive onto a DVD+R DL using “ImgBurn” in build mode by selecting “write files / folders to disc”.
The original DVD on my hard drive is = 8,331,739, 136 bytes.
But the DVD+R DL copy I made is = 8,331, 720, 704 bytes.
So there is a very small 18,000 bytes difference, but does this difference indicate a copy/burn error ?, should the DVD+R DL copy be the exact same amount of bytes as the original DVD ?, or is this difference normal ?