via this auction
It appears to take 5 1/4" floppies. Advert scan below.
"Back in the day on my studio, I used an Steinberg Pro-24/Atari ST set-up, and I can attest that the MIDI DJ was tightest compare with the ST and it is portable!. Below a couple of features, such as:As a conventional MIDI sequencer, recording polyphonic performances and overdubbing them in the usual fashion for playback 'live' or synchronised to tape via a drum machine.
Up to 12,000 note capacity per sequence
A total of 45,000 notes per disk (just limited by storage capacity of the disk)
Real time record
inboard clock for tempos from 1 - 255 beats per minute
Two track recording of data w/ "sound on sound" technique
Standard 5 1/4 floppy disk format and more.
· As a data filer which will let you store (for instance) DX7 sounds on a cheap 5 1/4" floppy disk rather than an expensive RAM cartridge.
· For those interested in playing live, as a playback machine for sequences which have been created on a much more complex system and easily incorporate MIDI and CV analog input and outputs
I assure you that this is one of a kind and it will be hard for you to find another one like this one and in this amazing state."
