[not getting truncate option]

so should i verify my burn? and u said earlier in another post that if the image size exeeds the extended disc then it wont show an option. but i dont get it either ways.......

[not getting truncate option]

my file is lesser than the extended disk size(maxburner payload) and yet i dont get the option to TRUNCATE rather than OVERBURN.

 

i just now went to general and ticked off the option of overburn from there but havent tried yet cause i have Wasted 5 CDs

till now on files which are XDG3.

 

PLEASE CAN SOMEONE TELL ME WHAT TO DO???

LIGHTNING UK CAN U HELP???