Apple Duo 270C manual Using floppy disks, Double-sided 800K disk, Second hole

Using floppy disks

Your computer does not have a floppy disk drive built in, but you can connect it to a floppy disk drive. (For instructions, go to the chapter on expanding your computer system.)

When you connect your computer to a floppy disk drive, you can use two types of 3.5-inch (89-millimeter) floppy disks:

nhigh-density disks (marked with the icon î), which can hold up to 1.4 megabytes (MB) of information

ndouble-sided disks, which can hold up to 800 kilobytes (K) of information

(The next page explains kilobytes and megabytes.)

Double-sided (800K) disk High-density (1.4 MB) disk

Second hole

High-density disk symbol

Taking care of floppy disks

Follow the care instructions that came with your disks, and remember three key points:

nKeep floppy disks away from magnets. Because information is stored on the disk in the form of magnetic signals, a magnetic field can destroy that information. Televisions and monitors, telephones, loudspeakers, and certain kinds of lighting fixtures all contain magnets.

nProtect disks from extremes of temperature and humidity.

nDo not open the disk’s metal shutter. Touching the disk inside the shutter could damage it.

Chapter 4: Learning More About Your PowerBook 69