Toshiba Modular Bay FDD. Drive device speed: 300 RPM, Drive device, transfer rate: 500Kbit/sec (high) / 250Kbit/sec (low), Total storage capacity: 1.44MB / 720KB (WinXP doesn`t support 720 KB. Data transfer rate: 0.5 Mbit/s. Size: 88.9 mm (3.5 ")