Save scenes directly to USB

A nice feature for the CQ series would be the ability to save Scenes without having to save as a Show.

In my application, I would like to go to my rehearsal space where there is a CQ-18T and load a Scene I have created my my CQ-18T at home and loaded on to a USB drive. This would save me from saving the current Show on the rehearsal CQ-18T and overwriting it with my Show and then restoring it after use. I currently do this with my SQ-5 mixers.

I would like to know that if you save a show does it have to be on a USB directly to have a proper recall of every single setting that you do from FXEQ channel name in etc.