What is a Rewritable Blank CD?

Rewritable blank compact discs (CD-RWs) are used to store computer data and files. With the use of a CD burner, you can delete and update the information on a CD-RW with new data, making these discs appropriate for frequent backups.

Rewritable CDs

• Before using a rewritable CD, you need to format the disc to prepare it to store data with the use of a CD burner. Formatting the disc erases any information previously stored on it. The formatted, blank, rewritable CD can then store files written to it from a CD burner.

CD-RWs vs. CD-Rs

• CD-RWs are a newer form of disc than Compact Disc Recordables (CD-Rs), which can only store data one time. Most newer CD burners or drives can read and write to both types of discs, but older models can only read CD-Rs. Many CD players cannot read CD-RWs used to record audio files but can read CD-Rs.

Considerations

• When backing up files for short-term use, CD-RWs make a better choice than CD-Rs in terms of convenience, but CD-Rs reliably store data for long-term use that you cannot erase. While you can update information on a CD-RW, it means erasing and re-recording information on the disc each time you use it.