I had been burning large photo files to CD. I had never done this with a DVD. I wanted to look at the pics via my DVD player . . so I bought my first DVD-Rs . . at Office Depot, their brand. When I inserted one of these for burning (after selecting pics) . . the 'hamsters' kept it a while, then kicked it out . . as unacceptable I assume. The instructions for burning to DVD appear identical to using a CD, so what's the problem? Cheap DVDs ?? I'm using a 'basic' iMac G5. Thanks.