roughly 9 gigs of data. You can't back up 9 gigs onto 4.7 gigs. Thus, if you're going to fit all the material, you've got to use a higher rate of compression. If you do that, there will be some loss of quality. If your TV doesn't show the higher quality to begin with, you won't notice any difference.
BTW, making copies of such disks is a violation of federal law.
I've been backing up my dvds on to 4.7GB DVD+R disc. Now I've been reading up on the ways to back up a dvd, the thing is that all the guides leave you with only the main movie. They say all this bull about why you can't fit the whole dvd (menus, extras, main movie) on to the disc. I've successfully managed to backup an entire dvd onto a dvd+r. I've done this with several dvds including seasons also. So I want to know why all the "experts" say this can't be done. Am I doing something wrong? Are my DVDs going to self destruct or something? I've made perfect backups, no loss of quality, full menu function...but everybody says it can't be done without using dvd-9 dics or either have 50 programs. I use two programs to make a perfect copy in like 45 minutes which includes ripping, encoding and burning. I don't understand why everyone says it can't be done.