Fastest Way to get to Save Data Set-Up

[redfishingboat]

I have just dreamed up a workflow that will save me incredible amounts of time shooting sports or concerts -- but it relies on me being able to quickly create custom folders on my Memory card.   I know my X-T2 can do this in the "Save Data Set-Up > Select Folder " option, but that is very clunky to get to.   I was super excited to map that to one of the custom buttons but I see now that is not possible! 

So I thought I would ask folks here: Is there any trick to getting "Save Data Set-Up" assigned to custom button? Or in one of the custom setting C1-7s?  If your life depended on it, what is the fastest way to get to that setting? 

-Mick