[Q] Move video cache on Kodi to usb thumbdrive? topic

I have a fire TV with Kodi and use Foldermount and Stickmount to move Kodi files from the device to the usb stick I have installed on the unit. How do I go about having all the video streaming cache from Kodi go on to my usb stick, so I don't get a low memory message when I am streaming HD video? As far I know the files located at data.kodi.org that I have folder mounted on to my USB drive only contain thumbnails & add ons. TIA!