CD-write Backups
Once slow and unreliable, CD-write technology (also known as CD-R) has greatly improved. When burning a CD-ROM, the user selects the files that will be backed up through a simple user interface, inserts a blank or rewritable CD into the drive and clicks on the button to burn a CD.
Pros: With CD drives on almost every computer, this option is highly versatile; and the cost of blank CDs can be as little as $0.50 per disk or lower when purchasing 100 or more.
Cons: As drive speeds increase, it can be difficult to read older CDs on newer drives. In some cases, you may find that you can only access old CDs through the original drive. Also, at 650 MB per disk, companies that regularly need to backup large amounts of data can hit a size limitation.
Cost: While drive prices vary, $125-$200 is typical; the cost of individual CDs can range from $0.50-$2.00 per disk.