Apple IIgs System Disk Request

[MC68060@gmail.com]

I read in the FAQ that the kind souls here occasionally offer up
startup disk sets for newbies.

I just got an old IIgs and it came with a questionable copy of System
5.0.2.  It booted once correctly, then on subsequent boots I get a "can
not load descriptor" error.  The disk was always write protected so I'm
not sure what to think.

I'm willing to send blanks, or a few $$$ to cover disks and time.

A couple of questions:

The system came with a Vulcan 20MB HD.  The drive is old (1989) but it
sounds like it's spinning up at least.  Is there an install/prep/test
disk available for this?  Is it worth it to get this HD running, or
should I look for something else?

The system is a ROM 01 and has a GS Sauce 4MB RAM card.  Anything else
I need?

I think that transfering via null-modem would be the easiest since I
don't have access to old Macs to write disk images.  Is there an option
I'm missing?  What's the best/easiest terminal program to use on the
IIgs side?