Mac Drives
Macintosh 400K (M0130)800K External Drive (M0131) The Macintosh 400K external disk drive was introduced in 1984 with the original Macintosh. It is capable of using 3.5-inch 400K SSDD (Single-Sided/Double Density) disks. It can also use 800K DSDD (Double-Sided/Double Density), but will only record to one of the 400K sides of the disk. In other words, …