TD0

Overview
TeleDisk was an early PC based disk imaging program. It was often used to image floppy disks from other systems, notably IBM mainframes or DEC workstations

The file format provides for splitting disk images into multiple parts; in this case, the second part will have a .TD1 extension, the third .TD2, and so on. In practice split disk images are extremely rare.

Sample files

 * https://telparia.com/fileFormatSamples/archive/teledisk/