Commodore AMIGA Introduction Manual page 38

A requester appears. A requester is something the Amiga uses to
communicate with you. Here, the requester tells you how many times
you ' ll have to change disks as you copy. Select Continue to go on:
A new requester asks you to put the disk you want to duplicate in drive O.
(Drive 0 is the disk drive in the main unit. Drive 1 is an external disk
drive.) Since the Workbench disk is already in drive 0, select Continue to
go on:
Getting Started 3-15