Epson Apex, User Manual

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Write-protecting diskettes
You can write-protect a diskette to prevent its data from being
altered. When a diskette is write-protected, you can read data
from it, but you cannot store new data on the diskette or delete
any files it contains. If you try to change data stored on a write-
protected diskette, the computer displays an error message.
To write-protect a diskette, cover the small, rectangular notch
with an adhesive write-protect tab. These write-protect tabs
usually come in the box with new diskettes when you buy them.
If you need to change data on a write-protected diskette, remove
the write-protect tab.
Making backup copies
Always make backup copies of all your data and system
diskettes. Copy all diskettes that contain programs, such as the
master system diskettes that come with your Apex, and use only
the copies. Store your original system diskettes in a safe place
away from your working diskettes.
2-12 Using Your Apex