I have the DEveloper CD V2.1 (made by Schatztruhe for Haage-Partner). In the DEvinfo section there are some docs about NSD device and also Trackdisk64. It is mainly consists of NSDPAtch, NSDQuery tool, Install and Readme.Guide. For TD64 there is just a readme file.
It is pretty much the same as this file on Aminet: disk/misc/NSDPatch43_20.lha.