3 KB is correct.
OK so I tested this now on two versions of Workbench.
WB 3.0 runs it just fine.
WB 3.1 gets the DISC ERROR.
I am in contact with the developer of DAAD Ready, and we are trying to sort it out.
The ADF version works just fine so you can mount that one, or copy it to a floppy.
I did some of the artwork, but a friend did most. We both fiddled with the palette to find a nice thing. Some parts are photos/stock art/free assets that has been pixelated down.