Patch cables will need to be stored externally, as with other semi-modular synths. I've seen little cable hangers but it would be unusual to have that as part of the main design.

They say that it comes with a custom hard case to hold both the main unit and the keyboard.

Korg worked previously with David Friend of Arp and the Alan R Pearlman Foundation to reissue the Arp 2600 and Arp Odyssey. The Arp 2600 Full Size design is somewhat similar to this, although smaller, in that it comes with its own flight cases.

I have Korg's smaller still Arp 2600M reisslue and that came with a suitcase and foam inserts to hold the main unit, keyboard, patch cables and sequencer.

I get the impression that the PS-3300 is meant to be set up permanently in one place like a studio rather than being gigged.