HP Compaq Presario,Presario 7RPM11 Software Manual page 7

Click the PacketCD button. The CD-R Format Options screen is displayed:
3.
CD-Recordable Format Options screen
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HINT: When formatting a CD-R or CD-RW, you can choose standard or compressed format. The
Compress Format option doubles storage capacity and improves read and write performance.
However, a compressed disc can only be read by a PC equipped with just!burn software.
Learning About Your just!burn CD-Rewritable (CD-RW) Software 1-5