When I started with my first PC (and I did get a PC because I needed a machine with a hard drive) a backup took about 70 diskettes. Years later I found that a full backup of my hard drive took about 70 CDs - I wasn't making headway.
Then, since there weren't any USB drives yet, I kept my old PC and added a second drive to it, which I used over a parallel port network to back up what was important on my main PC. Then I added a second drive to the main PC and had two levels of backup.
Nowadays, if I wanted to back up a multi-terabyte disk to optical disks I wonder how many blu ray disks it would take and what they would cost. I don't really care since I am not going to insert them all in the drive one after the other, anyway.
Now, thanks to USB 3.0, I can back up nicely onto hard drives at a reasonable cost, both financially and time-wise.
The other use for optical disks was to share data - replacing the diskettes that more and more often became irritating because they were rarely readable on another machine's drive. Nowadays we rarely ever see computers with diskette drives. To quickly burn some stuff to a CD - or one or more DVDs if it was something biggish - became second nature. But even that is the exception today, thanks to USB flash drives or real hard drives, or even a large-ish email attachment or dropbox entry.
As an "itinerant IT instructor" I keep a bunch of old 60-100 GB USB drives around to quickly share the required data at the start of the course. I can't imagine what I would be doing without those ...
No, a CD or DVD is only required if I want to leave the recipient with a permanent copy of whatever I am sharing.
Was this reply helpful? (1) (0)