Write from Kodi directly to USB removable drive

-Shield software is up to date.
-Kodi is @16.1.
-USB Drive is a Sandisk Extreme CZ80 64GB
-USB Drive formatted Fat32
-Download target directory is “com.plexapp.mediaserver.smb”

I am able to download from Kodi to the internal drive of the shield at the directory location of “com.plexapp.mediaserver.smb”.

I’d like to be able to download files directly from Kodi to the above portable flash drive at that same directory location on the flash drive.

When I attempt to do a download to the flash drive now it appears that all is good. 10%, 20%… 100% and then the message indicating completed successfully but no file in the above mentioned download directory.

What does work… I can plug the flashdrive into my computer and put files in the com.plexapp.mediaserver.smb directory, safely eject, plut it into the shield and read the file in Kodi. This I have now done. Am I doing something wrong? Is there any way I can write directly from Kodi to that same directory on the flash drive (I’d like to keep it portable) without setting up the flash drive as dedicated to the shield?

Any help/suggestions would be greatly appreciated. REeally frustrated at this point!