When the first Macintosh model (actually titled the “Macintosh 128K”) hit the market in 1984, it featured a 3.5-inch floppy disk drive built by Sony, the industry standard at the time. Originally, Apple had planned to include its own proprietary Twiggy 5.25-inch drive, but engineers deemed it unreliable, despite its larger storage capabilities (860 KB to Sony’s 400KB floppys).
Beyond Rare: Apple Macintosh 128k Prototype With 5.25-inch Twiggy Disk Drive For Sale On eBay
Just recently, an extremely rare prototype of the 128k Mac with a Twiggy drive has surfaced on eBay


