The Symbiotic SymbFile SCSI range were early external SCSI hard discs
for the Macintosh Plus which had an unusually featureful driver,
allowing for multiple partitions, password-protected partitions, and a
DA which allowed dynamic mounting and dismounting of partitions.
The first download is a diskcopy 4.2 image of version 3.5 of the
software. It is a bootable floppy that contains all the software
necessary to format, initialise and set up the drive. I do not know
whether it works or can be made to work with other SCSI HDs.
The first manual download is the entirety of the user manual for the
Symbfile, which also includes details of how to use the software.
