I have a Performa 6400 with OS 9. I recently won Wizardry 2 on Ebay, and also have a Mac Plus. I need a startup disk for the Mac Plus. I tried downloading some old system software, and have made various copies using the Performa, by simply copying the files to the floppy. I'm using 2DD 800k Mac Formatted Disks. If I use Make a Copy in Disk Copy, it ejects the floppy and says insert a double-sided floppy.