Final answer:
Optical disks are not practical for backup today due to their limited storage capacity, susceptibility to damage, slower data transfer speeds, and decreased convenience compared to other modern backup options.
Step-by-step explanation:
Optical disks are not considered practical for backup in today's technology landscape. One of the main reasons is that optical disks have limited storage capacity compared to other backup options, such as external hard drives or cloud storage. Optical disks, like CDs and DVDs, typically have capacities ranging from 700MB to 9GB, which may not be sufficient for backing up large amounts of data.
In addition, optical disks can be easily damaged or scratched, which can lead to data loss. They are also slower to write and read data compared to other backup options. Furthermore, their reliance on physical media makes them less convenient and portable than other backup solutions.
Therefore, while optical disks were popular for backup in the past, they have become less practical compared to more modern options that offer larger storage capacities, faster data transfer speeds, and better durability.