How to burn a CD/DVD multiple times?

Hi,

Consider I have a raw (unused) CD/DVD. I want to burn some data in it. My data only gets about 20% of the capacity of that CD or DVD. Maybe some time in future I want to add some more data on that. How can I burn that primary data to that CD to be able to add more in future?
Is it possible to do that work with only Windows built-in apps or I should surely use some other apps like Nero?

My machine: Windows 7 Ultimate 32-bit

Thank you Archer,
Apparently we can't do that work without using any non-built-in app on Win 7. (I don't mean using CD like a flash)

Thanks.