How to burn a large directory of files to Dual Layer disk

[radarguy]

I have tried a couple of ways to do this but I keep getting the message that there is not enough room on the disk for the files and do I want to truncate.  I had assumed that an ISO(MDS) file made from the "Create image file from disc" command would simply be written to the DL disc with the "Write image file to disc" command. Apparently not so.  It really does not seem to recognize that I even have a dual layer disc in the drive. 

I am using a Plexor dual layer read/write drive. 

Thanks for any suggestions.

[LIGHTNING UK!]

Yes, that's how you'd burn an ISO made from Build mode.

 

If it's asking you to overburn/truncate, either the drive isn't reporting the full capacity of the disc or you just made the image too large in the first place.