I have been succesful with SOME discs, but only those discs that originally was packed to .MSA files on a real Atari. The .ST files that were converted to .MSA files on PC/Mac does not work. Seems like I would need an Atari application that can unpack .ST files, but as far as I know that doesn´t exist...
The HD drive works great however, and works miracles when transporting MSA files bigger than 720kb (almost all of them)...