New, fully tested System 3.0 400K boot disk suitable for use in the Macintosh 128K, 512K and Plus. This system image has been written to a new, TDK double density floppy disk and will work as a startup disk on the Macintosh 128K, 512K or Plus with either a 400K or 800K floppy disk drive. If you know your Macintosh has an 800K drive, we advise buying our 800K System 3.2 disk.
Note: Since a faulty floppy disk drive can damage a floppy disk, you should insert a dispensable disk first to make sure the drive is loading, ejecting and not making any unhealthy noises.
