maximal size of TRD image

[GriV]

Usually no.
Unreal ZX emulator can't use large (more than 83 tracks) trdos disk images - internal checking disable all tracks after 83 (even if it presents). And size of .TRD files can't be greater than 640K.
SCL files can contain more than 80-84 tracks, but you cant' is it because of track checking.

Supported both 640K images and cutted of .TRD files.
Cutted images does not contain zero-filled tracks at end of disk, at all.
I never (maybe I forgive it?) see .TRD images more than 640K.

Current utilities (AMD01, SpectrumNavigator, plugins for FAR) does not support larger than 640K size of .TRD files.