I believe what everyone is missing here is this. These are 400K disks.
They are probably only written on one side. The Apple 3.5 drives
will only do double sided disks. 800k, am I wrong here? You need the
older Mac drive, the 400K single sided drive that was used on the
Mac 512's. Is this correct? I'm not altogether certain of what I'm saying
but if I'm right then it may be impossible to copy those disks without
one of these drives, which are sometimes on eBay, although I've only
seen 2 in like 8 months. Maybe someone like AllTech has one lying
around. Just a thought.