Kreisen 3 8 6 X / X E - Manual (Page 111)

Put the “source” diskette in drive A, and the “target” diskette
in drive B. At this time, you may want to check the directories
of both diskettes in order to make sure you will not overwrite a
file on the target diskette with the same name as the one you
want to copy.
Once you’re sure its safe to copy, enter the COPY command
with the following format:
A> COPY A:(filename) B:
For example, to copy the file “MAYSALES.RPT” from drive
A to drive B, enter the command.
A> COPY A:MAYSALES.RPT B:
When the copying process is done, the computer will display:
You can also enter this command without the default drive
letter, as:
A > COPY MAYSALES.RPT B:
When no drive letter is specified for the source drive, MS-DOS
assumes that you want to copy a file from the default drive.
Using Floppy Disks 5-11