The Template Language (what is used in SendTo... or Save To...) allow both Literal and custom column use.
Your choice of 2 different drive paths , simply because of metadata, complicates things. CC can make that happen by a filter
CC was intended as a front end to reading apps, just like Calibre does on the PC (use internal viewer for selected formats, else use the OS default).
\sdcard\
{#where}\
{title}-
{authors}
#where is Your
Custom Column where you set the folder name that book should land in on the SDcard (the actual name needs to match how to get to your card on that device)
Are Calibre Column lookup names