This task implies the ability to re-combine the package files back into the original file or data stream.
It also allows the creation of parity files such as parchive (PAR) to verify and restore missing or corrupted package files.
Another advantage with this is coping with file size limits on some file systems of removable media, or coping with volume size limits of things like floppy disks.
In this case, many smaller files are first packaged into a data stream and then repackaged into a multi-file archive.
Many file spanning utilities are available for nearly every OS and platform.