ZX Spectrum Beta Disc 3.5" floppy
The ZX Spectrum Beta Disc 3.5" floppy is the 3 1/2" disk format used with ZX Spectrum computers, with the TR-DOS filesystem.
5¼" and 3½" floppies are used with the following formats (sources are unclear as to which of these formats are used with each of the sizes):
|Number of tracks per side||Number of sides||Number of tracks (total)||Number of sectors||Number of bytes|
Diskettes can be dumped to TRD files for use in emulators.