I'm pretty sure I had one of Sierra's King Quest games on a series of 12 disks (though they might have been 5.25" 512kb floppies). You'd walk from one screen to another and be met with "Please insert disk 8 of 12".
3.5" disks/drives could also be 720KB, I have an 8086 from Olivetti with a 360KB and a 720 KB drive. I know 2880 kbyte disks and drives existed too (they used to be mentioned in every BIOS) , but I never saw a computer with one.
There was a 3,5" floppy compatible "SuperDisk" standard which could store up to 120Mb per disk. But the Zip disk already had a big market share then.
I remember using QIC-80 tapes for "software sharing" - since those drives were reasonably cheap and could be wired to an existing floppy disk controller.
120 Mb at floppy drive speeds? That must have been painfully slow...