Epson 10020 - Manual (Page 57)

On the Apex 100\20, you can load the operating system and
application programs from the hard disk, create and store your
data there, and use the diskette drive just for copying data to or
from diskettes.
Note
If you have only one diskette drive and no hard disk, you
need to use that drive to load the operating system as well as
the application programs you are using. First load the
operating system; this copies if to the computer's memory
(RAM) so you do not need to leave the system diskette in
the drive. Then you can remove that diskette and insert the
program diskette you want to use, and load that into memory
too. See your application program manual for detailed
instructions.
Using the Hard Disk Drive
You can create and revise files on a hard disk just as you do
on a diskette. The hard disk, however, provides several
advantages:
The 20MB hard disk can store as much data as 55 360KB
diskettes-approximately 10,000 pages of text
Your computer can perform all disk-related operations
faster
You can store all your frequently used programs and data
files on the hard disk, eliminating the inconvenience of
inserting and removing diskettes to access different files.
The added storage capacity makes it easy to move back and
forth between different programs and data files. However,
because it is so easy to add programs and files to your hard disk,
you may find yourself trying to organize hundreds of files.
2-16 Using Your Computer