Epson Apex 20020 - Manual (Page 69)

Note
If you only have 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 it into the computer’s memory
(RAM) so you do not need to leave the 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 can on
a diskette. The hard disk, however, provides several
advantages:
The 20MB hard disk can store more data than 16 1.2MB
diskettes and the 40MB hard disk can store twice as much.
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.
MS-DOS lets you keep related files together in directories and
subdirectories so they are easier to find and use. See Chapter 4
for instructions on how to use directories.
Using Your Computer 3-17