https://thenextweb.com/contributors/2018/09/16/everything-you-need-to-know-backup-technology/

The concept of backup is as old as data itself. The technology associated with it has traveled a long distance coming from floppy disks, backup CDs and DVDs, then USBs and now to dedicated backup appliances and offsite or remote backup repositories.

Unlike the past, backup technology is now on a completely different scale. The backup market has seen explosive growth over the last few years and a number of reports suggest a stable continuation of the rise in the market growth rate.