Epson 10020 - Manual (Page 84)

To delete an empty directory from a disk, use the RMDIR
command, or its shorthand equivalent, RD. For example, to
remove the directory ACCOUNTS, which is a subdirectory in
the LEDGER directory, type the following and press Enter:
RD \LEDGER\ACCOUNTS
If you are currently in the LEDGER directory, you can enter
the command as follows:
RD ACCOUNTS
Formatting Diskettes
Before you can store data on a new diskette, you must format it.
Formatting prepares the diskette so that MS-DOS can write to
it. You need to do this only once, before you use the diskette
for the first time.
You can reformat previously used diskettes. This process erases
all data on the diskette, however; so be sure you do not want to
save any of the data on a used diskette before you format it.
If you plan to use a new diskette to make a backup copy of
another diskette, you do not need to format it first; the
DISKCOPY program automatically formats a blank diskette if
it has never been formatted. (See the description of
DISKCOPY later in this chapter.)
The formatting procedure you use depends on whether you
have the Apex 100 or the Apex 100\20. Follow the
instructions below for your configuration.
Using MS-DOS With Your Computer 3-25