DVD Won't Write

I have been trying to copy some files from one drive to DVD.

When I try to use FINDER- I get error- 0x8002006e.

When I try to use TOAST 10, I get errors-
SENSE KEY - MEDIUM ERROR
SENSE CODE - 0X73, 0X04
SENSE KEY - MEDIUM ERROR
SENSE CODE - 0X0C
WRITE ERROR
DISK FAILED TO BE WRITTEN...

What the heck is up??

I-Mac
Processor 2.66 GHz Intel Core i5
Memory 16 GB 1067 MHz DDR3

Are you dragging the files from the drive to the desktop, opening Toast and selecting DATA and moving the files to the Toast window?

I have drug files to DVD in Finder, I have selected files in Toast and get error messages and never a DVD.

I have tried TDK & Memorex DVD-R. Really difficult to find +R around here.

Have you tried dragging them desktop, opening Toast, choosing Data and when the window opens drag the files there/

Yes, still get..."The disc can’t be burned because an unexpected error occurred (error code 0x8002006E)."

Maybe Verbatim media and a optical drive clean might work. Fingers crossed:-

https://discussions.apple.com/thread/1422026?start=60&tstart=0