The Tandy Disk Drive uses 3.5 inch floppies. If it helps, the specifications
say: Stoarage capatcity: per disk: 101.12K, per track 2560 bytes, per hard
sector 1280 bytes. Disk: Number of surfaces:1, number of tracks: 40, number
of hard sectors: 80. Recording system: Recording method: FM, recording
density, 4064 BPI, Track density 67.5 TPI, data transfer rate 125K bits/sec
Process time: average access time 820 ms, track to track 60 ms, settling time
20 ms, motor start time 1 s. Rotational speed: 300 rpm. Number of index: 2.
Does that mean anything to you? –Don