Du kanske skall ta och läse i hjälpen till Toast, se på sidan 44.
"Multi-session CDs: If you are making a data CD and would like
to leave the disc “open” so you can record additional data sessions
at a later time, click the Advanced tab and choose Write Session.
You can now continue to add data to this CD until you have
exceeded its capacity or you choose Write Disc to “close” it. Each
recording session will appear as a unique disc icon on your
Desktop – this is normal Mac OS behavior and is not controlled
by Toast. You cannot make multi-session DVDs or Blu-ray discs."