Epson 10020 - Manual (Page 71)

To copy REPORT, FACTS, and MEMO from drive A to a file
named DATA on drive B, type the following and press Enter:
COPY A:REPORT + A:FACTS + A:MEMO B:DATA
Remember these rules when copying files:
You must tell MS-DOS where to find the original file and
where to store the copy; that is, you need to specify the
drive (and directory, if necessary) for Both.
You cannot create a new file with the same name and in
the same directory as an existing file.
If there is a file on the destination diskette or directory that
has the same name as the file you are copying, the copy
automatically replaces the existing file. There is no warning
that the existing file is Being replaced; so be careful that
you do not accidentally erase a file you want to keep.
If you are copying to another diskette, that diskette must
have been previously formatted.
Note
You can also use the XCOPY command to copy individual
files or groups of files. XCOPY, an external command, offers
an efficient way to copy certain groups of files. For details
about XCOPY, see your MS-DOS Reference Manual.
Renaming Files
You can use the RENAME command to change the name of a
file or group of files on the same disk and directory. For
example, to rename a file named PROSPECT (in the default
directory) to CLIENT, type the following and press Enter:
RENAME PROSPECT CLIENT
3-12 Using MS-DOS With Your Computer