Damn you Mack, I feel old now...
Anyone else remember using a hole punch to make single-sided floppy disks into double-sided floppy disks (back when they were actually big and floppy)?
That only worked on 5 1/4" floppy disks - the 8" floppy disks were truely one sided. Cassette tapes for program loading? Commodore 64/128 or Leading Edge Model D with an 8086 chip running DOS 2.11. Ah click of death - what a painful way to die... I actually used to carry around the parallel ZIP drive back when I was working tech support, Windows 98 fit on a single disk. Remember SyQuest also had their 'EZ Drive'?
To add more knowledge, a "clone" type backup is more inline with the included backup tools in Windows7/8 and Mac (Time Machine). File based backup is like what Carbonite/Backblaze/iDrive offer - where you select your directories and they back them up.
File backup is better for photos and documents, while Image backup is better for programs and personal settings. Thankfully you can stack your backup options - especially when you have multiple drives. Use a clone or image based backup for your c:\ drive, while your photos out on e:\ are backed up using a file based technology.