Download content for offline view

I know this isn’t the standard way off using kodi, but anyway;
I’m using kodi on my tablet z, streaming content from my media server and using a shared DB with my htpc.

When outside my home I’m using vpn to access my content and everything works fine on a Nice wifi connection.

But it would be Nice if it’s possible to download content to my tablet and use the vpn just for updates to the DB when I’m on a 4g or 3g connection. Is that possible?

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