Depending on the software you are using to write to the CD, you would have
the option to 'close' the disc (and not allow any further files to be added)
or you could have checked an option to 'allow other files to be added later'
leaving the disc 'open' to 'updates' as you called them.
Windows XP burning program allows this and works just fine, allowing you
to, for example, put photos onto the CD and then burn more later as you
collect them until the disc is full.
Depending on the software you are using to write to the CD, you would have
the option to 'close' the disc (and not allow any further files to be added)
or you could have checked an option to 'allow other files to be added later'
leaving the disc 'open' to 'updates' as you called them.
Windows XP burning program allows this and works just fine, allowing you
to, for example, put photos onto the CD and then burn more later as you
collect them until the disc is full.
Keep in mind that the XP burner, and many others, will automatically close
a disk after burning AUDIO files. This is necessary to ensure
compatibility with most standalone players. So, when burning an audio CD,
assemble all the desired files beforehand, because additional tracks
cannot be added later.
