Overwrite files CD-R

on a cdr, you cannot overwrite a file as that implies that the tracks previously used by that file would become freed up. Rather, you are appending more data to the disc and relying on your system to be intelligent enough to pick up on the replacement.

If you did not Finilize the disc, you MAY be able to put a new file on there and the TOC will update to reflect the name.  I have done this with the name of the disc, but i am not sure about files.  With the prices of Cd-r's, it cant hurt to try.

You can put on another file AFTER your others, but you cant edit or delete what is already written

Cheers
Cof

it is not that you add only a file, you create a new session, and all you write comes in that session. If you want to read such a multisession CD on another system, it can be that it only displays one or the last session you wrote.  However, you can read it always on the original writer; and after closing the CD, it is readable on most cd drives without problems

I use NTI -Z  CD burner . There there is an option to write the disc in multisesion. But it writes in multisession only if you left the previous session open. By defalt the cd burners write it with the session left open if there is space.
If you have closed the seession then it is not possible to write again . Try a CD-RW u can write thousands of times.

If you are burning a complete 700 MB file on a disc like an avi movie then the burner will ask you to close the session so that the disc cant be written any more but any way there wont be any space to write thats why