-Kodi is installed on the Steam Link now
-USBMount is installed too and the Stick is mounted

since Steam Link only has ~500MB free space i wanna use the USB-Stick to save Kodis data on it (like downloaded covers for DVDs or CDs and all for the library)

and i need to install "Widevine" for an app in order to use it.
problem is, due to legal reasons, u have to download the whole Google Chrome OS image to extract the Widevine files thru Kodi

problem here: the image file is about 2GB big and cant be downloaded to the intern SL diskspace.

so i want Kodi to download the file on the USB-Stick instead SLs diskspace in order to use it.

is this somehow possible? Like Kodi is installed on the SL device but uses the USB-Sticks memory to download and install everything?