Files with td? extension are used by the Teledisk tool used on MS-DOS.
TD? file extension - TeleDisk archive file
What is td? file? How to open td? files?
File type specification:
The td? file extension is associated with Teledisk a popular disk archival tool that was used around 1990. Teledisk was originally released as a shareware program by Sydex. Its still available as a disk archival tool in a number of MS-DOS program archives. The ? represents numbers from 0 to 9.