Tape Drive Emulators are pretend tape drives which write the same data to their disk files as would appear on the tape. The disk files are created in the user's application support folder for DDPAfterBurner, with the file names Tape101, Tape102, etc. A user preference specifies how many, if any, tape drive emulators are created when the application is loaded.
The tape files on disk are identical to the files as they would be written to tape, except for length words which are used to simplify the detection of file marks.
Until a tape drive emulator is used as the destination of a copy, it cannot be used as a source, since it is in effect an empty cartridge.