Epson Apex, User Manual, Page: 79 / 158

You can also completely back up all your files and then tell
BACKUP to add only those files that have been modified since
the last time you ran BACKUP. This process, called an incre-
mental backup, makes regular backups faster to perform.
Be sure you have enough formatted diskettes to back up the
data on your hard disk drive. It can take about 50 360KB
diskettes to copy a 20MB hard disk drive that is completely full
(although it is rare that you would store this many files on a
hard disk). In any case, you don’t want to run out of formatted
diskettes during the backup process.
See your MS-DOS reference manual for complete instructions
on using BACKUP.
The HELP Utility
The HELP command provides information on all MS-DOS
commands and utility programs. This help function provides
useful information but is not intended to be a substitute for the
MS-DOS reference manual.
The format of this command is:
HELP [command...]
Type HELP only to see a menu of all commands. Type
HELP
followed by the name of one or more MS-DOS commands, each
separated by a space, to bypass the menu and display the mes-
sages for each command.
When the menu is displayed, you see this prompt at the bottom
of the screen:
Select command name, Enter to
display command,
Esc to Exit
3-22 Using MS-DOS with Your Apex