So what you're saying is that it will be added to a new extent on 0:1:1:2... Makes sense, and i think the attached screenshot backs it up...
I clicked past the Warning screen on the add extents, double checked the size and stopped at the complete screen - and it's showing an additional extent on 0:1:1:2...
So as one final check before i click complete, it's definately not going to remove the existing data, just format the new extent???
Sorry for asking again, just dont want to click the wrong thing and wipe everything out...
Cheers
Gavin