Dvd burning issue

[Doombard]

So today I finished torrenting wii games to back up my own and I started to burn them onto a DVD. First time it went fine. Now every time I try to burn the discs it keeps telling me to either insert a blank disc or that there is not enough room on the disc. Sometimes if I keep trying to burn it over and over it will eventually go through. wtf mate?

[Blubbartron]

Did you make sure you're using the proper format of disk? DVD+R and DVD-R, and all their variations are technically different formats, with burners specific to a format.