Apple Macintosh PowerBook 145B - Manual (Page 25)

What you need
Just as you’d need paper to make copies of important documents,
you need floppy disks to copy the information on your hard disk.
You can probably buy the floppy disks at the same place you
bought the computer.
Floppy disks come in a variety of sizes and capacities. The ones
you need for this chapter are called high-density 3.5-inch disks.
You can recognize the disks by the way they look:
Even though these disks are called “floppy disks,” they aren’t
actually floppy.
Depending on exactly what was installed on your computer at the
factory, the information will fill between 10 and 20 high-density
disks. Since disks usually come in boxes of ten, you should have
two boxes of disks before starting the instructions.
If you don’t have enough disks, you can skip this section for the
moment. But the sooner you make the backup copy, the better.
Buy the disks as soon as possible, then follow the instructions in
this chapter.
High density disks
have two holes.
High-density disks
have this symbol.
Chapter 1: Setting Up Your Macintosh PowerBook 9