Hi, I've made quite a few burns with these Memorex4X DVD-R's and nearly everyone one of them glitches,stuters,hisses and pops at one point or another during gameplay. GTA VC even locks up for crying out loud. I've read on here that you need grade A media. Are memorex not up to par or what do you think is my problem? I have ONE game burned with Maxell and it's flawless. My other big question is...if I go out and get Maxell discs...can I use my Memorex back ups to make new back ups? Or do I need to use the originals again?