Welcome to the forum.
I hope you're backing up legit, legally bought games.
As for burning ISOs, normally any good burning software can do that properly. Some older Nero versions could indeed cause issues with DL burning, but I think it's history now with the newer versions. Don't quote me on that though.
Nevertheless, I'll recommend IMGBurn as it's light, fast, powerful, efficient, and free.
Final note, this question was not for the blank media section, try and find the right sub-forum next time (burning software was the relevant one here).